noun. Same as abbot.

"Siluanus the abbat married them, vnto whom the very same day, king Godred gaue a portion of ground in Mirescoge, where he built a Monastery: howbeit, in processe of time, the said land with the monkes, was granted vnto the abbey of Russin."

Earle  abbeie  abbesse  attaine  boldnesse  

Abba  abba  abbas  abbot