Incest in folklore is found in many countries and cultures in the world.

Greek

In Greek mythology

Greek mythology

Greek mythology is the body of myths and legends belonging to the ancient Greeks, concerning their gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. They were a part of religion in ancient Greece...

, Zeus

Zeus

In the ancient Greek religion, Zeus was the "Father of Gods and men" who ruled the Olympians of Mount Olympus as a father ruled the family. He was the god of sky and thunder in Greek mythology. His Roman counterpart is Jupiter and his Etruscan counterpart is Tinia.Zeus was the child of Cronus...

 and Hera

Hera

Hera was the wife and one of three sisters of Zeus in the Olympian pantheon of Greek mythology and religion. Her chief function was as the goddess of women and marriage. Her counterpart in the religion of ancient Rome was Juno. The cow and the peacock were sacred to her...

 were brother and sister as well as husband and wife. They were the children of Cronus

Cronus

In Greek mythology, Cronus or Kronos was the leader and the youngest of the first generation of Titans, divine descendants of Gaia, the earth, and Uranus, the sky...

 and Rhea

Rhea (mythology)

Rhea was the Titaness daughter of Uranus, the sky, and Gaia, the earth, in Greek mythology. She was known as "the mother of gods". In earlier traditions, she was strongly associated with Gaia and Cybele, the Great Goddess, and was later seen by the classical Greeks as the mother of the Olympian...

 (also married siblings). Cronus and Rhea, in turn, were children of Uranus

Uranus (mythology)

Uranus , was the primal Greek god personifying the sky. His equivalent in Roman mythology was Caelus. In Ancient Greek literature, according to Hesiod in his Theogony, Uranus or Father Sky was the son and husband of Gaia, Mother Earth...

 and Gaia

Gaia (mythology)

Gaia was the primordial Earth-goddess in ancient Greek religion. Gaia was the great mother of all: the heavenly gods and Titans were descended from her union with Uranus , the sea-gods from her union with Pontus , the Giants from her mating with Tartarus and mortal creatures were sprung or born...

 (a son who took his mother as consort

Marriage

Marriage is a social union or legal contract between people that creates kinship. It is an institution in which interpersonal relationships, usually intimate and sexual, are acknowledged in a variety of ways, depending on the culture or subculture in which it is found...

, in some versions of the myth). Cronus and Rhea's siblings, the other Titans

Titan (mythology)

In Greek mythology, the Titans were a race of powerful deities, descendants of Gaia and Uranus, that ruled during the legendary Golden Age....

, were all also married siblings like Nyx

Nyx

In Greek mythology, Nyx was the primordial goddess of the night. A shadowy figure, Nyx stood at or near the beginning of creation, and was the mother of personified gods such as Hypnos and Thánatos...

 and Erebus

Erebus

In Greek mythology, Erebus , also Erebos , was often conceived as a primordial deity, representing the personification of darkness; for instance, Hesiod's Theogony places him as the first five beings to come into existence from Chaos...

. Myrrha

Myrrha

Myrrha , also known as Smyrna , is the mother of Adonis in Greek mythology. She was transformed into a myrrh tree after having had intercourse with her father and gave birth to Adonis as a tree...

 committed incest with her father, Theias

Theias

In Greek mythology, Theias was the King of Assyria and father of Myrrha and Adonis. The birth of Adonis existed in two different versions:#The most commonly accepted version is that Aphrodite urged Myrrha or Smyrna to commit incest with her father, Theias. Myrrha's nurse helped with the scheme....

, as bore Adonis

Adonis

Adonis , in Greek mythology, the god of beauty and desire, is a figure with Northwest Semitic antecedents, where he is a central figure in various mystery religions. The Greek , Adōnis is a variation of the Semitic word Adonai, "lord", which is also one of the names used to refer to God in the Old...

.

Sophocles

Sophocles

Sophocles is one of three ancient Greek tragedians whose plays have survived. His first plays were written later than those of Aeschylus, and earlier than or contemporary with those of Euripides...

' tragic play Oedipus the King

Oedipus the King

Oedipus the King , also known by the Latin title Oedipus Rex, is an Athenian tragedy by Sophocles that was first performed c. 429 BCE. It was the second of Sophocles's three Theban plays to be produced, but it comes first in the internal chronology, followed by Oedipus at Colonus and then Antigone...

features the ancient Greek king inadvertently consummating

Consummate

Consummation or consummation of a marriage, in many traditions and statutes of civil or religious law, is the first act of sexual intercourse between two individuals, following their marriage to each other...

 an incestuous relationship with his mother.

Norse

In Norse mythology

Norse mythology

Norse mythology, a subset of Germanic mythology, is the overall term for the myths, legends and beliefs about supernatural beings of Norse pagans. It flourished prior to the Christianization of Scandinavia, during the Early Middle Ages, and passed into Nordic folklore, with some aspects surviving...

, Loki

Loki

In Norse mythology, Loki or Loke is a god or jötunn . Loki is the son of Fárbauti and Laufey, and the brother of Helblindi and Býleistr. By the jötunn Angrboða, Loki is the father of Hel, the wolf Fenrir, and the world serpent Jörmungandr. By his wife Sigyn, Loki is the father of Nari or Narfi...

 accuses Freyr

Freyr

Freyr is one of the most important gods of Norse paganism. Freyr was highly associated with farming, weather and, as a phallic fertility god, Freyr "bestows peace and pleasure on mortals"...

 and Freyja of committing incest, in Lokasenna

Lokasenna

Lokasenna is one of the poems of the Poetic Edda. The poem presents flyting between the gods and Loki....

. He also says that Njörðr had Freyr with his sister. This is also indicated in the Ynglinga saga

Ynglinga saga

Ynglinga saga is a legendary saga, originally written in Old Norse by the Icelandic poet Snorri Sturluson about 1225. It was first translated into English and published in 1844....

which says that incest was legal among the Vanir

Vanir

In Norse mythology, the Vanir are a group of gods associated with fertility, wisdom and the ability to see the future. The Vanir are one of two groups of gods and are the namesake of the location Vanaheimr . After the Æsir–Vanir War, the Vanir became a subgroup of the Æsir...

.

In Norse legends, the hero Sigmund

Sigmund

This article is about the mythological hero Sigmund; for other meanings see: Sigmund .In Norse mythology, Sigmund is a hero whose story is told in the Völsunga saga. He and his sister, Signý, are the children of Völsung and his wife Hljod...

 and his sister Signy

Signy

Signy or Signe is the name of two heroines in two connected legends from Scandinavian mythology which were very popular in medieval Scandinavia. Both appear in the Völsunga saga, which was adapted into other works such as Wagner's Ring, including its famous opera The Valkyrie.The first Signe was...

 murdered her children and begot a son, Sinfjötli

Sinfjötli

Sinfjötli or Fitela in Norse mythology was born out of the incestuous relationship between Sigmund and his sister Signy...

. When Sinfjötli had grown up, he and Sigmund murdered Signy's husband Siggeir

Siggeir

Siggeir is the king of Gautland , in the Völsunga saga. In Skáldskaparmál he is given as a Sikling and a relative of Sigar who killed the hero Hagbard...

. The element of incest also appears in the version of the story used in Wagner

Richard Wagner

Wilhelm Richard Wagner was a German composer, conductor, theatre director, philosopher, music theorist, poet, essayist and writer primarily known for his operas...

's opera-cycle Der Ring des Nibelungen

Der Ring des Nibelungen

Der Ring des Nibelungen is a cycle of four epic operas by the German composer Richard Wagner . The works are based loosely on characters from the Norse sagas and the Nibelungenlied...

, in which Siegfried

Sigurd

Sigurd is a legendary hero of Norse mythology, as well as the central character in the Völsunga saga. The earliest extant representations for his legend come in pictorial form from seven runestones in Sweden and most notably the Ramsund carving Sigurd (Old Norse: Sigurðr) is a legendary hero of...

 is the offspring of Siegmund and his sister Sieglinde.

The legendary Danish king

Legendary Danish kings

The legendary kings of Denmark are the predecessors of Gorm the Old, half history and half legend. The accounts of the Danish kings are confusing and contradictory, and so this presentation tries to separate the various sources from each other...

 Hrólfr kraki was born from an incestuous union of Helgi

Halga

Halga, Helgi, Helghe or Helgo was a legendary Danish king living in the early 6th century. His name would in his own language have been *Hailaga ....

 and Yrsa

Yrsa

Yrsa, Yrse, Yrs or Urse was a tragic heroine of Scandinavian legend.She appears in several versions relating to her husband, the Swedish king Eadgils, and/or to her father and rapist/lover/husband Halga and their son Hroðulf...

.

Egyptian

In Egyptian mythology

Egyptian mythology

Ancient Egyptian religion was a complex system of polytheistic beliefs and rituals which were an integral part of ancient Egyptian society. It centered on the Egyptians' interaction with a multitude of deities who were believed to be present in, and in control of, the forces and elements of nature...

, the gods frequently married their siblings. For example, Shu

Shu

Shu may refer to:*Shū ** , Japanese Kanji.*Shu * 蜀 , an abbreviation of Sichuan province of the People's Republic of China, as well as the following historical regimes that have existed in this region:...

 and Tefnut

Tefnut

In Ancient Egyptian religion, Tefnut, transliterated tfnt is a goddess of moisture, moist air, dew and rain. She is the sister and consort of the air god Shu and the mother of Geb and Nut.- Etymology :...

 are brother and sister and they produced another pair of gods, Geb

Geb

Geb was the Egyptian god of the Earth and a member of the Ennead of Heliopolis. It was believed in ancient Egypt that Geb's laughter was earthquakes and that he allowed crops to grow. The name was pronounced as such from the Greek period onward,...

 and Nut

Nut (goddess)

In the Ennead of Egyptian mythology, Nut was the goddess of the sky.-Goddess of the sky:...

. Their children were Isis

Isis

Isis or in original more likely Aset is a goddess in Ancient Egyptian religious beliefs, whose worship spread throughout the Greco-Roman world. She was worshipped as the ideal mother and wife as well as the matron of nature and magic...

, Osiris

Osiris

Osiris is an Egyptian god, usually identified as the god of the afterlife, the underworld and the dead. He is classically depicted as a green-skinned man with a pharaoh's beard, partially mummy-wrapped at the legs, wearing a distinctive crown with two large ostrich feathers at either side, and...

, Set

Set (mythology)

Set was in Ancient Egyptian religion, a god of the desert, storms, and foreigners. In later myths he was also the god of darkness, and chaos...

 and Nephthys

Nephthys

In Egyptian mythology, Nephthys is a member of the Great Ennead of Heliopolis, a daughter of Nut and Geb. Nephthys was typically paired with her sister Isis in funerary rites because of their role as protectors of the mummy and the god Osiris and as the sister-wife of Seth.Nephthys is regarded as...

; Isis married Osiris, and Set Nephthyshttp://www.touregypt.net/featurestories/sexuality.htm

Chinese

In Chinese mythology

Chinese mythology

Chinese mythology is a collection of cultural history, folktales, and religions that have been passed down in oral or written tradition. These include creation myths and legends and myths concerning the founding of Chinese culture and the Chinese state...

, Fu Xi was a god-king who took his sister Nüwa

Nüwa

Nüwa is a goddess in ancient Chinese mythology best known for creating mankind and repairing the wall of heaven.-Primary sources:...

 as his bride.

Icelandic

In Icelandic folklore a common plot involves a brother and sister (illegally) conceiving a child. They subsequently escape justice by moving to a remote valley. There they proceed to have several more children. The man has some magical abilities which he uses to direct travelers to or away from the valley as he chooses. The siblings always have exactly one daughter but any number of sons. Eventually the magician allows a young man (usually searching for sheep) into the valley and asks him to marry the daughter and give himself and his sister a civilized burial upon their deaths. This is subsequently done.

British/Irish

In the Old Irish saga Tochmarc Étaíne

Tochmarc Étaíne

Tochmarc Étaíne , meaning "The Wooing of Étaín", is an early text of the Irish Mythological Cycle, and also features characters from the Ulster Cycle and the Cycles of the Kings. It is partially preserved in the manuscript known as the Lebor na hUidre , and completely preserved in the Yellow Book...

("The Wooing of Étaín

Étaín

Étaín is a figure of Irish mythology, best known as the heroine of Tochmarc Étaíne , one of the oldest and richest stories of the Mythological Cycle. She also figures in the Middle Irish Togail Bruidne Dá Derga . T. F...

"), Eochaid Airem

Eochaid Airem

Eochu Airem , son of Finn, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He succeeded to the throne after the death of his brother, Eochu Feidlech, and ruled for twelve or fifteen years, until he was burned to death in Fremain by Sigmall Sithienta. He was...

, the high king of Ireland is tricked into sleeping with his daughter, whom he mistakes for her mother Étaín

Étaín

Étaín is a figure of Irish mythology, best known as the heroine of Tochmarc Étaíne , one of the oldest and richest stories of the Mythological Cycle. She also figures in the Middle Irish Togail Bruidne Dá Derga . T. F...

. The child of their union becomes the mother of the legendary king Conaire Mor

Conaire Mor

Conaire Mór , son of Eterscél, was, according to medieval Irish legend and historical tradition, a High King of Ireland. His mother was Mess Búachalla, who was either the daughter of Eochu Feidlech and Étaín, or of Eochu Airem and his daughter by Étaín...

.

In some versions of the medieval British

Great Britain

Great Britain or Britain is an island situated to the northwest of Continental Europe. It is the ninth largest island in the world, and the largest European island, as well as the largest of the British Isles...

 legend of King Arthur

King Arthur

King Arthur is a legendary British leader of the late 5th and early 6th centuries, who, according to Medieval histories and romances, led the defence of Britain against Saxon invaders in the early 6th century. The details of Arthur's story are mainly composed of folklore and literary invention, and...

, Arthur accidentally begets a son by his half sister Morgause

Morgause

Morgause , known in earlier works as Gwyar or Anna, is the sister or half-sister of King Arthur in the Arthurian legend. In her earliest appearance she is Arthur's full sister by Uther Pendragon and Igraine; Gwyar is her name and she is the mother of Gwalchmei...

 in a night of blind lust, then seeks to have the child killed when he hears of a prophecy that it will bring about the undoing of the Round Table. The child survives and later becomes Mordred

Mordred

Mordred or Modred is a character in the Arthurian legend, known as a notorious traitor who fought King Arthur at the Battle of Camlann, where he was killed and Arthur fatally wounded. Tradition varies on his relationship to Arthur, but he is best known today as Arthur's illegitimate son by his...

, his ultimate nemesis.

Sri Lankan

In Sri Lanka

Sri Lanka

Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka is a country off the southern coast of the Indian subcontinent. Known until 1972 as Ceylon , Sri Lanka is an island surrounded by the Indian Ocean, the Gulf of Mannar and the Palk Strait, and lies in the vicinity of India and the...

n folklore, there are at least three significant instances where incest is mentioned. The forefather of the Sinhala

Sinhalese people

The Sinhalese are an Indo-Aryan ethnic group,forming the majority of Sri Lanka,constituting 74% of the Sri Lankan population.They number approximately 15 million worldwide.The Sinhalese identity is based on language, heritage and religion. The Sinhalese speak Sinhala, an Indo-Aryan language and the...

 race, "Sinhabahu

Sinhabahu

Sinhabahu was father of Vijaya of Sri Lanka, the first Sinhalese King and king of Sinhapura.According to the Mahavamsa's folklore , Sinhabahu's father was a lion and his mother a princess of Kalinga...

", is a king who married his own sister "Sinhaseevali". Incest is again mentioned when King Vijaya's son and daughter fled to the jungle together in protest of their father's second marriage. Also, the brother "Dantha" and the sister "Hemamalini" who brought the sacred tooth relic of Lord Buddha to the island, seemed to also have a married relationship. Despite the liberal mentioning of incest in folklore, Sri Lankan culture regards incest as a taboo. Then again, contemporary Sri Lankan culture is heavily influenced by the cultures of former colonial rulers, during the last couple of centuries.

Vietnamese

In ancient Vietnamese folklore, there is a tale of a brother and a sister. As children, the brother and sister fought over a toy. The brother smashes a stone over his sister's head, and the girl falls down unconscious. The boy thinks he has killed his sister, and afraid of punishment, he flees. Years later, by coincidence, they meet again, fall in love, and marry without knowing they are siblings. They build a house along a seashore, and the brother becomes a fisherman while his sister tends to the house. Together they have a son. One day, the brother discovers a scar on his wife's head. She tells him about the childhood fight with her brother, and the brother realizes that he has married his own sister. Overwhelmed with guilt over his incest, the brother goes out on the sea. Every day, the sister climbs to the top of the hill to look for her brother, but he never comes back. She died in waiting and became "Hon Vong Phu" ("the stone waiting for her husband").

Other

In fairy tales of Aarne-Thompson folktale type 510B, the persecuted heroine, the heroine is persecuted by her father, and most usually, the persecution is an attempt to marry her, as in Allerleirauh

Allerleirauh

Allerleirauh is a fairy tale recorded by the Brothers Grimm. Since the second edition published in 1819, it has been recorded as Tale no. 65. Andrew Lang included it in The Green Fairy Book....

or Donkeyskin

Donkeyskin

Donkeyskin is a French fairy tale told by Charles Perrault.Andrew Lang included it, somewhat euphemized, in The Grey Fairy Book.It is Aarne-Thompson folktale type 510B, unnatural love...

. This was taken up into the legend of Saint Dymphna

Dymphna

'Saint Dymphna was the daughter of a pagan Irish king and his Christian wife in the 7th century. She was murdered by her father. The story of St. Dymphna was first recorded in the thirteenth century by a canon of the Church of St. Aubert at Cambrai, commissioned by the Bishop of Cambrai, Guy I...

.

Several Child Ballads

Child Ballads

The Child Ballads are a collection of 305 ballads from England and Scotland, and their American variants, collected by Francis James Child in the late nineteenth century...

 have the motif of incest between brothers and sisters who are raised apart. This is usually unwitting (as in the The Bonny Hind

The Bonny Hind

-Synopsis:A squire persuades a maiden to lie with him. Afterward, she asks his name, and he reveals that he is a lord's son. She calls him a liar: she is that lord's daughter. The horror-struck son reveals that he was long at sea. She stabs herself to death, and he buries her...

and Sheath and Knife

Sheath and Knife

"Sheath and Knife" is a folk ballad.-Synopsis:A woman is pregnant with her brother's child. He takes her to the greenwood to have her child, but she dies...

, for example), but always brings about a tragic end.

There are also mentions of incest in the bible. In some cases, it can be logically inferred, since Adam and Eve (the supposed first people on earth) would have had to inbreed, since there were no other people.