(Mod. Ger. Friedrich; Ital. Federigo; Fr. Frederic and Federic; M.H.G. Friderich; O.H.G. Fridurih, " king or lord of peace," from O.H.G. fridu, A.S. frith, " peace," and rih " rich," "a ruler," for derivation of which see Henry), a Christian name borne by many European sovereigns and princes, the more important of whom are given below in the following order: - (r) Roman emperors and German kings; (2) other kings in the alphabetical order of their states; (3) other reigning princes in the same order.