Ge-síþman
Bosworth & Toller Anglo-Saxon Old English Dictionary - ge-síþman
According to the Old English Dictionary:
-mon;
- ge-síþman
- gen. -mannes, -monnes; m. A 'gesith;' comes :-- Se gesíþmon [gesíþmon, MSS. B. H.] the 'gesith,' L. In. 30; Th. i. 122, 1.