Last name origins & meanings:
- Scottish: from the Gaelic personal name Maol-Choluim
‘devotee of (Saint) Columba’ (see Colomb).
- Irish (Ulster): Anglicized form of Gaelic Ó Maolcholuim ‘descendant of the
devotee of St. Columba’ (Irish Colum Cille, literally
‘dove of the church’). In Ireland the personal name is often spelled
Colm; in Scotland it has become Calum.
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