In Irish-Celtic mythology, Ogma is the god of eloquence, genius, learning, and language. He is said to have invented the Runic language of the Druids, the Ogham alphabet, which was named in his honor. He is a member of the Tuatha Dé Danann, a champion among them. He may be related to the Gallic god Ogmios.

He is the father of Tuireann and the brother of Nuada. He found the sword named Orna at the second battle of Magh Tuireadh
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