Zeus

Zeus was, in Greek mythology, the father of the gods.

The First Doctor was mistaken for Zeus by the Greeks during the Trojan War in circa 1200 BC as well by the Trojan servant Katarina, who became one of his companions. (TV: The Myth Makers)

Hippias called a lightning bolt "a sphere of fire hurled by the hand of Zeus." (TV: The Time Monster)

Bigon swore by Zeus once. (TV: Four to Doomsday)

Both Axatil and his captain frequently swore by Zeus. (PROSE: The Lost Ones)