Odysseus is a character known from Greek mythology, beginning with the letter O. He was a participant in the Trojan War and the hero of Homer's Odyssey. He is called the legendary king of Ithaca. His father was Laertes and his mother Anticlea. Odysseus' wife was Penelope. He devised a ruse by which the Greeks won the war.
Olympus, whose name begins with the letter O, is the home of the mythological Zeus. It was said that every time a man tried to climb the mountain, he immediately fell down. Olympus is mentioned in Greek mythology. The mountain massif was considered the seat of the Greek gods.
Okeanids are sea nymphs with the name starting with the letter O. They come from Greek mythology. They were the daughters of Oceanus and Thetis. It is believed that there were three thousand of them, and each of them was the patron saint of a lake, pond, river or sea. The most powerful of them was the Styx.
Orion is one of the characters in Greek mythology whose name begins with the letter O. Described as a giant and a hunter of great strength. He was the handsome son of Euriale and Poseidon. Orion's wife was Side, who was cast down to Tartar because of her beauty.