Donald, Donaldson - Anglicised Surnames in Ireland

Padraig Mac Giolla-Domhnaigh
1923

Donald, Donaldson—These two names, and there are about a dozen more forms, are the later anglicised forms of McDonald. (In Irish Gaelic Mac Dómhnaill, in Scottish Gaelic Mac Dómhnuill).

Alphabetical Index of Anglicised Surnames in Ireland

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