68%RatingSave Gender Masculine Usage Irish, English (Rare) Pronounced Pron. KLAN-see(English) [key·IPA] Meaning & History From the Irish surname Mac Fhlannchaidh, which means "son of Flannchadh". The Irish name Flannchadh means "red warrior". Rate·DetailsPeople think this name is classic natural wholesome strong strange simple Categories colors, rare English, red, Simpsons characters, warrior, Y vowels Entry updated June 13, 2019 ·