The story
- Scottish Gaelic · calque ofMacTamhais“MacTavish”
- English todayThomson
From Tom + -son, originally meaning "son of Thomas". In some instances of people so named, a calque of Scottish Gaelic MacTamhais (“MacTavish”). Also an anglicisation of the Gaelic name MacTamhais, meaning "son of Thomas". Many with the name MacTavish changed their name to Thomson and Thompson after Culloden. Being derived from Thomas ultimately gives this surname an Aramaic derivation - teoma 'twin'.
Words from the same roots
Etymology from Wiktionary, CC BY-SA 4.0.