Amlaím Ua MuirethaigG Catholic also known in Latin as Mauricius, was a medieval Irish bishop.'Raphoe and Derry in the 12th and 13th Centuries' Gwynn, A pp84-100: 'Donegal Annual' IV no.2 (1959)

He was styled "Bishop of Ard-Macha and Cenel-Feradhaigh" in the Annals of Ulster and appears to be reckoned as coarb of Saint Patrick in the Book of Leinster, but probably took care over the See of Cinél nEógain. Muirethaig died at Cenél Feradaig Cruthnai in 1185 and is buried at Derry.

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