Uilliam Ó Cormacáina, Archbishop of Tuam 5 May 1386 – 1393.
Ó Cormacáin was a member of an eccleiastical family based in Síol Anmchadha, in what is now south-east County Galway. Muirchertach Ua Carmacáin (died 1203) served as Bishop of Clonfert, as did Uilliam after becoming Archbishop.
References
Uilliam Ó Cormacáin Wikipedia(Text) CC BY-SA