From Wiktionary, the free dictionary
From Old Irish ád, ág.
àigh m (genitive singular àigh, plural àighean)
- happiness, joy
- fortune, luck, providence, auspiciousness
àigh
- happy, joyous, blissful
- lucky, auspicious
- Edward Dwelly (1911) “àigh”, in Faclair Gàidhlig gu Beurla le Dealbhan [The Illustrated Gaelic–English Dictionary][1], 10th edition, Edinburgh: Birlinn Limited, →ISBN