From Mac Suibhne, ‘pleasant one’ — Scottish-Gaelic gallowglass warriors who settled Donegal in the thirteenth century and never left.
Gaelic Origin · Root meaning ‘pleasant, agreeable’
Sweeney comes from Suibhne, built to mean ‘pleasant’ or ‘agreeable’ — an ironic root for a name earned by the sword. The Mac Suibhne arrived from Scotland as gallowglass, elite mercenary soldiers, in the thirteenth century and settled across Donegal's Fanad, Banagh and Doe peninsulas.
Imported soldiers who became, within a few generations, as native to Donegal as the O'Donnells they served — the same road McLoughlin and Doyle once travelled from the other direction.
Irish form: Mac Suibhne
