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...

, Pylades (icon; Greek: Πυλάδης) is the son of King Strophius

Strophius

In Greek mythology, Strophius, son of Crisus, was a King of Phocis, husband of the sister of Agamemnon and by her father of Pylades and Astydameia. When Orestes was hiding from his murderous mother, Clytemnestra, Strophius hid him...

 of Phocis

Phocis

Phocis is one of the regional units of Greece. It is part of the administrative region of Central Greece. It stretches from the western mountainsides of Parnassus on the east to the mountain range of Vardousia on the west, upon the Gulf of Corinth...

 and of Anaxibia

Anaxibia

Anaxibia is the name of five characters in Greek mythology.*Anaxibia, the daughter of Bias and Iphianassa, and niece of Melampus. She married Pelias, to whom she bore Acastus, Pisidice, Pelopia, Hippothoe, Alcestis, and Medusa...

, daughter of Atreus

Atreus

In Greek mythology, Atreus was a king of Mycenae, the son of Pelops and Hippodamia, and the father of Agamemnon and Menelaus. Collectively, his descendants are known as Atreidai or Atreidae....

 and sister of Agamemnon

Agamemnon

In Greek mythology, Agamemnon was the son of King Atreus and Queen Aerope of Mycenae, the brother of Menelaus, the husband of Clytemnestra, and the father of Electra and Orestes. Mythical legends make him the king of Mycenae or Argos, thought to be different names for the same area...

 and Menelaus

Menelaus

Menelaus may refer to;*Menelaus, one of the two most known Atrides, a king of Sparta and son of Atreus and Aerope*Menelaus on the Moon, named after Menelaus of Alexandria.*Menelaus , brother of Ptolemy I Soter...

. He is mostly known for his strong friendship with his cousin Orestes

Orestes (mythology)

In Greek mythology, Orestes was the son of Clytemnestra and Agamemnon. He is the subject of several Ancient Greek plays and of various myths connected with his madness and purification, which retain obscure threads of much older ones....

, son of Agamemnon.
Orestes had been sent to Phocis during his mother Clytemnestra

Clytemnestra

Clytemnestra or Clytaemnestra , in ancient Greek legend, was the wife of Agamemnon, king of the Ancient Greek kingdom of Mycenae or Argos. In the Oresteia by Aeschylus, she was a femme fatale who murdered her husband, Agamemnon – said by Euripides to be her second husband – and the Trojan princess...

's affair with Aegisthus

Aegisthus

In Greek mythology, Aegisthus was the son of Thyestes and of Thyestes' daughter, Pelopia....

. There he was raised with Pylades, and so considered him to be like a brother. While Orestes was away, Clytemnestra killed her husband, Orestes' father Agamemnon

Agamemnon

In Greek mythology, Agamemnon was the son of King Atreus and Queen Aerope of Mycenae, the brother of Menelaus, the husband of Clytemnestra, and the father of Electra and Orestes. Mythical legends make him the king of Mycenae or Argos, thought to be different names for the same area...

.
As an adult, Orestes returns to Mycenae

Mycenae

Mycenae is an archaeological site in Greece, located about 90 km south-west of Athens, in the north-eastern Peloponnese. Argos is 11 km to the south; Corinth, 48 km to the north...

/Argos

Argos

Argos is a city and a former municipality in Argolis, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Argos-Mykines, of which it is a municipal unit. It is 11 kilometres from Nafplion, which was its historic harbour...

 seeking revenge for the death of Agamemnon.