m., dat. jöfri, pl. jöfrar:

I. [A. S. eofor; O. H. G. epar; Germ. eber; Lat. aper]:—a wild boar; but it occurs in this sense only twice or thrice in poetry, Merl. 1. 39, Gkv. 2. 24.

II. metaph. a king, warrior, prob. from the custom of wearing boar’s heads as helmets, cp. A. S. eofor-cumbol and Hildigöltr; jöfurr in this sense is not used in prose, but is freq. in old poetry, even in poems as old as the Ýt., see Lex. Poët. Sense I. is unknown to the Scandin., and sense II. to the Teut. languages.