The story
- Polish · borrowed fromFilan
- Irish · derived fromÓ Fialáin“descendant of Fialán”
- English todayFilan
Two main origins: * Reduced Anglicized form of Irish Ó Fialáin (“descendant of Fialán”), a personal name derived from a diminutive of fial (“generous”). * Borrowed from Polish Filan, a derivative of Fila.
Etymology from Wiktionary, CC BY-SA 4.0.