McKerr rhymes with “fair” not “fur”.
I am descended from McKerrs from in and around Portadown, County Armagh, Northern Ireland. My great-grandfather, James M’Kerr AKA James McKerr was raised a Quaker but later joined the Church of Ireland.
Proposed origins for this surname include:
• Clan Kerr (with some patriotic superfluous Scottishisation)
– This is the most obvious descent to claim.
• Clan Currie
• Clan Ferguson
• Mac an Gheairr / Mac An Ghirr / McGirr / McGerr / MacGerr / MacGirr / MacGhir