Coolson, Coulson

Padraig Mac Giolla-Domhnaigh
1923

Coolson, Coulson—These two names are later anglicisations of McCoul and McCool, found in the Isles, Argyleshire, Donegal and Derry, in Gaelic Mac Cumhaill.

Alphabetical Index of Anglicised Surnames in Ireland

See also Woulfe’s Irish Names and Surnames
and O'Hart's Irish Pedigrees