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...

, Dia was the daughter of Deioneus

Deioneus

In Greek mythology, Deioneus or Deion is a name attributed to the following individuals:*Son of Aeolus, king of Phocis, and father of Cephalus, Actor, Aenetus, Phylacus, Nisus and Asterodia....

 or Eion

Eion

Eion was an ancient Greek Eretrian colony in Thracian Macedonia. It sits at the mouth of the Strymon River which flows into the Aegean from the interior of Thrace...

, sister of Callisto

Callisto

Callisto may refer to:*Callisto , a nymph*Callisto , a moon of Jupiter*Callisto , a genus of moths in the Gracillariidae family*Callisto , a character on Xena: Warrior Princess...

 and mother of the Lapith Pirithous

Pirithous

In Greek mythology, Pirithous - Πειρίθοος was the King of the Lapiths in Thessaly and husband of Hippodamia, at whose wedding the famous Battle of Lapiths and Centaurs occurred....

, whose marriage to Hippodameia

Hippodamia (wife of Pirithous)

Hippodamia and δαμάζειν damazein , "Tamer of horses"; also known as Deidamia ), daughter of Atrax or Butes, was the bride of King Pirithous of the Lapiths. At their wedding, Hippodamia, the other female guests, and the young boys were almost abducted by the Centaurs. Pirithous and his friend,...

 was the occasion of the Lapiths' battle with the Centaurs. Like many nymph mothers of heroic figures, Dia had both a mortal husband, "cloud-like" Ixion

Ixion

In Greek mythology, Ixion was king of the Lapiths, the most ancient tribe of Thessaly, and a son of Ares, or Leonteus, or Antion and Perimele, or the notorious evildoer Phlegyas, whose name connotes "fiery". Peirithoös was his son...

, and an immortal father of her child— 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...

, a sky-god himself, who wielded the thunderbolt. In the plains of Thessaly

Thessaly

Thessaly is a traditional geographical region and an administrative region of Greece, comprising most of the ancient region of the same name. Before the Greek Dark Ages, Thessaly was known as Aeolia, and appears thus in Homer's Odyssey....

under all this open sky and cloud, Dia's son was a horseman.