Aegipan that is, Goat-Pan, was according to some statements a being distinct from Pan

Pan (mythology)

Pan , in Greek religion and mythology, is the god of the wild, shepherds and flocks, nature, of mountain wilds, hunting and rustic music, as well as the companion of the nymphs. His name originates within the Greek language, from the word paein , meaning "to pasture." He has the hindquarters, legs,...

, while others regard him as identical with Pan. His story appears to be altogether of late origin. According to Hyginus

Gaius Julius Hyginus

Gaius Julius Hyginus was a Latin author, a pupil of the famous Cornelius Alexander Polyhistor, and a freedman of Caesar Augustus. He was by Augustus elected superintendent of the Palatine library according to Suetonius' De Grammaticis, 20...

 he was the son of 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 Aega (also named Boetis or Aix), and was transferred to the stars. Others again make Aegipan the father of Pan, and state that he as well as his son was represented as half goat and half fish. When Zeus in his contest with the 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....

 was deprived of the sinews of his hands and feet, Hermes

Hermes

Hermes is the great messenger of the gods in Greek mythology and a guide to the Underworld. Hermes was born on Mount Kyllini in Arcadia. An Olympian god, he is also the patron of boundaries and of the travelers who cross them, of shepherds and cowherds, of the cunning of thieves, of orators and...

 and Aegipan secretly restored them to him and fitted them in their proper places. According to a Roman tradition mentioned by Plutarch

Plutarch

Plutarch then named, on his becoming a Roman citizen, Lucius Mestrius Plutarchus , c. 46 – 120 AD, was a Greek historian, biographer, essayist, and Middle Platonist known primarily for his Parallel Lives and Moralia...

, Aegipan had sprung from the incest

Incest

Incest is sexual intercourse between close relatives that is usually illegal in the jurisdiction where it takes place and/or is conventionally considered a taboo. The term may apply to sexual activities between: individuals of close "blood relationship"; members of the same household; step...

uous intercourse of Valeria of Tusculum

Tusculum

Tusculum is a ruined Roman city in the Alban Hills, in the Latium region of Italy.-Location:Tusculum is one of the largest Roman cities in Alban Hills. The ruins of Tusculum are located on Tuscolo hill—more specifically on the northern edge of the outer crater ring of the Alban volcano...

 and her father Valerius, and was considered only a different name for Silvanus

Silvanus (mythology)

Silvanus was a Roman tutelary deity of woods and fields. As protector of forests , he especially presided over plantations and delighted in trees growing wild. He is also described as a god watching over the fields and husbandmen, protecting in particular the boundaries of fields...

.