Ó Faoláin is an Irish Gaelic surname whose literal meaning is "descendant of Faolán." It is closely related to the anglicized forms Whelan and Phelan, which are common in Ireland and among the Irish diaspora. Origin and Etymology The name derives from the personal name Faolán, which in Old Irish meant "little wolf" (fáel meaning "wolf" plus a diminutive suffix). Saint Faolán, an Irish missionary active in Scotland, helped popularize his name in early medieval Ireland. The patronymic prefix Ó indicates a male-line grandchild or descendant, so originally this was used by a clan or sept claiming descent from a particular Faolán. Historical Bearers At least one bishop from the Ó Faoláin family appears on the ecclesiastical rolls: Eugenius Ó Faoláin served as Bishop of Kilmacduagh from 1409 until his death in 1418. In modern times, the surname was illustrated by celebrated figures such as Seán Ó Faoláin, one of the most influential figures in 20th-century Irish literature. Among other bearers are his daughter Julia O'Faolain (a novelist and short-story writer) and historian/journalist Nuala O'Faolain. Variants and Distribution Since the 17th century, most families of this surname have used the anglicized form Whelan or Phelan (the initial Ph representing the Gaelic F sound in lenition). Other variants recorded include Fylan, Hyland 2, and Whalen. The patronymic clan—variously spelled Ó Faoláin, Ó Faoileáin, and O'Faolain—was historically associated with Counties Waterford and Cork, though later scattered through Munster. Meaning: Descendant of Faolán (little wolf) Origin: Irish Gaelic Type: Patronymic surname Usage regions: Primarily Ireland (Munster); also Irish diaspora