It can be both.
The Scottish name Forbes is spelled Forbeis or Foirbeiseach in Scottish Gaelic. They are also in Ireland.
In Ireland the Connacht (Sligo-Mayo) surname Mac Firbhisigh was changed to Forbes.
They may account for 25% of the name in Ireland.
Originally, it's an Irish name but a lot of Scottish people use it as well.
Maggie is a Scottish name. Meggie is Irish.
Northern English, and Scottish.
scottish causeim scottish and i should know
Irish an scottish of Irish origin