In Irish it's "ifreann"
Irish: mo Scottish Gaelic: mo Welsh: fy In Celtic languages "my" usually changes the first letter
Irish: fiagaí; sealgaireScots Gaelic: sealgairWelsh: helfarchIrish: fiagaí; sealgaire Scots Gaeli
Irish: ceannairc; éirí amach; reibiliúnScots Gaelic: ceannairc; aramach; reubalachdWelsh: gwrthry
There's actually no such language as "Celtic". Celtic refers to a group of dozens of languages, six