Uilliam Ó Duinnín

Uilliam Ó Duinnín (fl. 1670–1682) was an Irish scribe.

The son of Domhnall Óg Ó Duinnín, Uilliam was the owner of MS 1336, which he may have sold to Edward Lhuyd. He transcribed William Bedell's Irish Old Testament, which was published in 1685.