Efen-bisceop
Bosworth & Toller Anglo-Saxon Old English Dictionary - efen-bisceop
According to the Old English Dictionary:
efn-biscop, es;
- efen-bisceop
- m. A co-bishop; co-episcŏpus :-- Mid Laurentio and Justo his efenbisceopum cum Laurentio et Justo co-episcŏpis, Bd. 2, 5; Whelc. 122, 38. efen-bisceop