Mid 19th century; earliest use found in Catholic Directory. Initialism from post-classical Latin Ordo Sancti Francisci Capuccinorum, Ordinis Sancti Francisci Capuccinorum.
Definition of O.S.F.C. in US English:
O.S.F.C.
noun
Order of Saint Francis, Capuchin(s).
Origin
Mid 19th century; earliest use found in Catholic Directory. Initialism from post-classical Latin Ordo Sancti Francisci Capuccinorum, Ordinis Sancti Francisci Capuccinorum.