61%RatingSave Gender Masculine Usage English (Rare) Pronounced Pron. /ˈflæn.ə.ɡən/ [key·simplify] Meaning & History From an Irish surname, the Anglicized form of Ó Flannagáin, itself from the given name Flannagán, which was derived from Irish flann "blood red" and a diminutive suffix. Related Names RootFlanagan (surname) People think this name isRate·Details classic mature formal upper class natural strong strange complex serious Categories colors, Gundam characters, rare English, red, surnames