https://irishgodsandgoddesses.net/gods/tethra/
Tethra – Fomorian King of the Otherworld Sea | Irish Gods & Goddesses
Mar 22, 2026 - Tethra was a Fomorian king who ruled a realm beneath the sea. He was killed at the Battle of Mag Tuired, and his sword is said to have told the story of its...
king oftethrafomorianotherworldsea