Efn-biscop
Bosworth & Toller Anglo-Saxon Old English Dictionary - efn-biscop
According to the Old English Dictionary:
es;
- efn-biscop
- m. A co-bishop; co-episcŏpus :-- Mid Laurentio and Justo his efnbiscopum cum Laurentio et Justo co-episcŏpis, Bd. 2, 5; S. 507, 30.