Manchán of Lemanaghan (d. 665), son of Sillán, patron of Liath Mancháin, now Lemanaghan, in County Offaly.
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Mainchín of Limerick (fl. late 6th century), son of Sétna, patron saint of Limerick.
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Manchán of Min Droichit (d. 652), also Manchéne, scholar and abbot of Min Droichit (Co. Offaly).
There are variant traditions concerning the saint's pedigree, possibly owing to confusion with one of several churchmen named Manchán or Mainchín.
Mainchín mac Colláin was an Irish saint in Corran who is supposed to have flourished in the late 5th or 6th century.