Tethra
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In Irish mythology, Tethra of the Fomorians ruled Mag Mell after dying in the Second Battle of Mag Tuiredh.[1] After the battle, his sword, Orna, was taken by Ogma and it then recounted everything it had done.[2]
Tethra may be derived from the Proto-Indo-European *tet(e)ro- meaning 'quacking sound'.[3] Tethra means both sea and scald-crow Badb or Roynston's crow in Old Irish.[4]