Who married Dub Lémna ingen Tighearnáin?

Dub Lemna ingen Tighearnáin, (also Dub Leamna) Queen of Ireland, died 943.

Donnchad Donn mac Flainn (Duncan of the Brown Hair, son of Flann) (died 944) was High King of Ireland and King of Mide. He belonged to Clann Cholmáin, a branch of the southern Uí Néill.