Euryalus refers to several different characters from 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...

 and classical literature:

1. In the Aeneid
   Aeneid
   The Aeneid is a Latin epic poem, written by Virgil between 29 and 19 BC, that tells the legendary story of Aeneas, a Trojan who travelled to Italy, where he became the ancestor of the Romans. It is composed of roughly 10,000 lines in dactylic hexameter...
   
   by Virgil
   Virgil
   Publius Vergilius Maro, usually called Virgil or Vergil in English , was an ancient Roman poet of the Augustan period. He is known for three major works of Latin literature, the Eclogues , the Georgics, and the epic Aeneid...
   
   , Nisus and Euryalus
   Nisus and Euryalus
   Nisus and Euryalus are a pair of friends serving under Aeneas in the Aeneid, the Augustan epic by Vergil. Their foray among the enemy, narrated in Book 9, demonstrates their stealth and prowess as warriors, but ends as a tragedy: the loot Euryalus acquires attracts attention, and the two die...
   
    are ideal friends and lovers, who died during a raid on the Rutuli
   Rutuli
   The Rutuli or Rutulians were members of a legendary Italic tribe...
   
   ans.
2. Euryalus was the son of Mecisteus
   Mecisteus
   In Greek mythology, Mecisteus was the son of Talaus and Lysimache. He participated in the attack on the city of Thebes with the Seven Against Thebes, along with his brother Adrastus. In Aeschylus' tragedy Seven Against Thebes, Mecisteus is not among the seven champions who attack the seven gates...
   
   . He attacked the city of Thebes
   Thebes, Greece
   Thebes is a city in Greece, situated to the north of the Cithaeron range, which divides Boeotia from Attica, and on the southern edge of the Boeotian plain. It played an important role in Greek myth, as the site of the stories of Cadmus, Oedipus, Dionysus and others...
   
    as one of the Epigoni
   Epigoni
   In Greek mythology, Epigoni are the sons of the Argive heroes who had fought and been killed in the first Theban war, the subject of the Greek Thebaid, in which Polynices and six allies attacked Thebes because Polynices' brother, Eteocles, refused to give up the throne as promised...
   
   , who took the city and avenged the deaths of their fathers, who had also attempted to invade Thebes. In Homer
   Homer
   In the Western classical tradition Homer , is the author of the Iliad and the Odyssey, and is revered as the greatest ancient Greek epic poet. These epics lie at the beginning of the Western canon of literature, and have had an enormous influence on the history of literature.When he lived is...
   
   's Iliad
   Iliad
   The Iliad is an epic poem in dactylic hexameters, traditionally attributed to Homer. Set during the Trojan War, the ten-year siege of the city of Troy by a coalition of Greek states, it tells of the battles and events during the weeks of a quarrel between King Agamemnon and the warrior Achilles...
   
   , he fought in the Trojan War
   Trojan War
   In Greek mythology, the Trojan War was waged against the city of Troy by the Achaeans after Paris of Troy took Helen from her husband Menelaus, the king of Sparta. The war is among the most important events in Greek mythology and was narrated in many works of Greek literature, including the Iliad...
   
   , where he was brother-in-arms of Diomedes
   Diomedes
   Diomedes or Diomed is a hero in Greek mythology, known for his participation in the Trojan War.He was born to Tydeus and Deipyle and later became King of Argos, succeeding his maternal grandfather, Adrastus. In Homer's Iliad Diomedes is regarded alongside Ajax as one of the best warriors of all...
   
   , and one of the Greeks to enter the Trojan Horse
   Trojan Horse
   The Trojan Horse is a tale from the Trojan War about the stratagem that allowed the Greeks finally to enter the city of Troy and end the conflict. In the canonical version, after a fruitless 10-year siege, the Greeks constructed a huge wooden horse, and hid a select force of men inside...
   
   . He lost the boxing match to Epeius
   Epeius
   There were two characters named Epeius in Greek mythology.#A Greek soldier during the Trojan War. He was the son of Panopeus and had the reputation for being a coward. In the Iliad he participated in the boxing match at the funeral games for Patrocles against Euryalus and won...
   
    at the funeral games for Patrocles
   Patrocles
   Patrocles name may refer to:*Patroclus *Patrocles of Thurii tragic poet 5th c.BC*Patrocles teacher of rhetoric mentioned by Quintilian*Patrocles Macedonian general and writer under Seleucus and Antiochus...
   
   . He is mentioned by Hyginus
   Hyginus
   Hyginus can refer to:People:*Gaius Julius Hyginus , Roman poet, author of Fabulae, reputed author of Poeticon astronomicon*Hyginus Gromaticus, Roman surveyor*Pope Hyginus, also a saint, Bishop of Rome about 140...
   
   , who gives his parents as Pallas and Diomede
   Diomede
   Diomede is the name of four women in Greek mythology.- Diomede of Lesbos :As written in Homer's Iliad, Diomede was a mistress of Achilles, taken up after the seizure of Briseis by King Agamemnon. Her father was Phorbas of Lesbos.- Diomede the Lapith :Diomede was a Lapith, and daughter of Lapithes...
   
   .
3. Euryalus was also the name of a son of Euippe
   Euippe (daughter of Tyrimmas)
   Evippe , daughter of Tyrimmas, King of Dodona, She bore Odysseus a son, Euryalus, who was later mistakenly slain by his father....
   
    and Odysseus
   Odysseus
   Odysseus or Ulysses was a legendary Greek king of Ithaca and the hero of Homer's epic poem the Odyssey. Odysseus also plays a key role in Homer's Iliad and other works in the Epic Cycle....
   
   , who was mistakenly slain by his father.
4. Euryalus was the name of two of Penelope
   Penelope
   In Homer's Odyssey, Penelope is the faithful wife of Odysseus, who keeps her suitors at bay in his long absence and is eventually reunited with him....
   
   's suitors, one of whom came from Zacynthus, and the other one from Dulichium
   Dulichium
   Dulichium, Dolicha, or Doliche was a place noted by numerous ancient writers that was either a city on, or an island off, the Ionian Sea coast of Acarnania, Greece....
   
   .
5. Euryalus was a suitor of Hippodamia
   Hippodamia
   Hippodamia was a daughter of King Oenomaus and wife of Pelops with whom her offspring were Thyestes, Atreus, Pittheus, Alcathous, Troezen, Hippalcimus, Copreus, Astydameia, Nicippe, Eurydice and others....
   
    who, like all the suitors before Pelops
   Pelops
   In Greek mythology, Pelops , was king of Pisa in the Peloponnesus. He was the founder of the House of Atreus through his son of that name....
   
   , was killed by Oenomaus
   Oenomaus
   In Greek mythology, King Oenomaus of Pisa, the father of Hippodamia, was the son of Ares, either by the naiad Harpina or by Sterope, one of the Pleiades, whom some identify as his consort instead...
   
   .
6. Euryalus was one of the eight sons of Melas
   Melas (mythology)
   In Greek mythology, the name Melas refers to a number of characters.*Melas, son of Poseidon and an unnamed nymph of Chios, brother of Agelus. He may or may not be identical to Melas, son of Poseidon, who was said to have given his name to the river Melas in Egypt, which was later renamed...
   
   , who plotted against their uncle Oeneus
   Oeneus
   In Greek mythology, Oeneus, or Oineus was a Calydonian king, son of Porthaon and Euryte, husband of Althaea and father of Deianeira, Meleager, Toxeus, Clymenus, Periphas, Agelaus, Thyreus , Gorge, Eurymede, Mothone, Perimede and Melanippe...
   
    and were slain by Tydeus
   Tydeus
   In Greek mythology, Tydeus was an Aeolian hero of the generation before the Trojan War. He was one of the Seven Against Thebes and was mortally wounded by Melanippus before the walls of the city. The goddess Athena had planned to make him immortal but refused after Tydeus in a rage devoured the...
   
   .
7. Euryalus, son of Naubolus, was one of the Phaeacians encountered by Odysseus in the Odyssey
   Odyssey
   The Odyssey is one of two major ancient Greek epic poems attributed to Homer. It is, in part, a sequel to the Iliad, the other work ascribed to Homer. The poem is fundamental to the modern Western canon, and is the second—the Iliad being the first—extant work of Western literature...
   
   .

Euryalus, son of Naubolus

In the Odyssey

Odyssey

The Odyssey is one of two major ancient Greek epic poems attributed to Homer. It is, in part, a sequel to the Iliad, the other work ascribed to Homer. The poem is fundamental to the modern Western canon, and is the second—the Iliad being the first—extant work of Western literature...

, Euryalus is a Phaeacian youth. Homer

Homer

In the Western classical tradition Homer , is the author of the Iliad and the Odyssey, and is revered as the greatest ancient Greek epic poet. These epics lie at the beginning of the Western canon of literature, and have had an enormous influence on the history of literature.When he lived is...

 gives him the epithet "the peer of murderous Ares". Next to Laodamas

Laodamas

In Greek mythology, Laódamas referred to five different people.-Laódamas, son of Eteocles:Laodamas, son of Eteocles, inherited Thebes from his father...

, he is said to be the most handsome of the Phaeacians, and is the best wrestler. He convinces Laodamas to challenge Odysseus

Odysseus

Odysseus or Ulysses was a legendary Greek king of Ithaca and the hero of Homer's epic poem the Odyssey. Odysseus also plays a key role in Homer's Iliad and other works in the Epic Cycle....

, then rebukes him when he refuses to participate, saying "No truly, stranger, nor do I think thee at all like one that is skilled in games, whereof there are many among men, rather art thou such an one as comes and goes in a benched ship, a master of sailors that are merchantmen, one with a memory for his freight, or that hath the charge of a cargo homeward bound, and of greedily gotten gains; thou seemest not a man of thy hands." When King Alcinous

Alcinous

Alcinous or Alkínoös was, in Greek mythology, a son of Nausithous, or of Phaeax , and father of Nausicaa, Halius, Clytoneus and Laodamas with Arete. His name literally means "mighty mind"...

orders him to make amends, he gives Odysseus a bronze sword with a silver hilt and an ivory sheath.