Mallon, Mellon, ó Mealláin
A Gaelic surname derived from meall meaning ‘pleasant’. An ecclesiastical sept of the Cineál Eoghain who were hereditary keepers of the Bell of St. Patrick. They were seated in the parish of Donaghmore, near Dungannon in Tyrone. Also see Mulholland. In 1890 Mallon was principally found in Armagh, Antrim, and Tyrone, and the estimated number of bearers was 2,150. Mellon was principally found in Tyrone and the estimated number of bearers was 540. In the United States Mallon is the 8,093rd most numerous surname with an estimated 2,750 bearers.