Origin: 1505–15; < Middle French javeline, by suffix alteration from javelot,Anglo-French gavelot, gaveloc, probably < Old English gafeluc, *gafeloc ≪ British Celtic *gablākos presumably, a spear with a forklike head; compare MIr gablach forked branch, javelin, MWelsh gaflach (apparently < OIr), derivative of Old Irish gabul fork, forked branch, cognate with Old Breton gabl,Welsh gafl
late 15c., from M.Fr. javeline (15c.), fem. dim. of O.Fr. javelot "a spear," probably from Gaulish (cf. O.Ir. gabul "fork;" Welsh gafl "fork," gaflach "feathered spear"). Also found in It. (giavelotto) and M.H.G. (gabilot).