Uilliam Ó Cormacáina, Archbishop of Tuam 5 May 1386 – 1393.

Ó Cormacáin was a member of an ecclesiastical 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.

• Henry Ó Cormacáin

• The Surnames of Ireland, Edward MacLysaght, 1978.

• http://www.ucc.ie/celt/published/T100005C/
• https://archive.org/stream/fastiecclesiaehi04cottuoft#page/n17/mode/2up
• http://www.irishtimes.com/ancestor/surname/index.cfm?fuseaction=Go.&UserID=

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