Rex-geníþla

According to the Old English Dictionary:

(?)

rex-geníþla

a royal foe (?) :-- Ne meahte hé oncyrran rexgeniðlan ( = cyning- (?), cyne- (?) geníþlan Elene; either word alliterates with cwéne), hé wæs on þǽre cwéne gewealdum, El. 610. rex-geniþla