rare: Dublin, Cork etc. Ir. Mac Giolla Dé (servant of God). However present distribution suggests an English origin, which is from French gai, light-hearted. Quite common in England. See also Gildea and Kildea.
Gay households in each
county in the Primary Valuation property survey of 1847-64.
Click on a county name for a breakdown of the number of households by parish (paying).