Ímar Ua Ruaidín (died 1176) was Bishop of Kilmacduagh.
Ua Ruaidín (Ó Ruaidín, Rooane, Ruane, Rowan) was of one of two apparently unrelated families, based in what would become County Mayo and County Galway, respectively.
His predecessor may have been a Bishop Ua Clérig, a member of the local Ui Fiachrach Aidhne dynasty.
Ó Ruadháin derives from the first name Ruadhán, the red-haired one.
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