Mainchín mac Colláin was an Irish saint in Corran who is supposed to have flourished in the late 5th or 6th century.
His father is named Collán, while his mother is said to have been Deidi, daughter of Tren, son of Dubthach, who was chief poet to King Lóegaire mac Néill.
[1] Deidi or Dediva (Editua in the Martyrology of Cashel) occurs elsewhere as a mother of saints such as Senán son of Fintan, Caillin (a disciple of Columba), Fedlimid of Kilmore, Daigh son of Carill, Femia, daughter of Carill, and Diarmait of Inis Clothrann.
[2] The Martyrology of Donegal associates the saint with the region of Corran, which John O'Hanlon has preferred to identify as being coterminous with the barony of Corann in Co.
David Camerarius, in his calendar, calls her Mancina and describes her as a virgin saint who worked miracles in the Hebrides.