incidentally it is curious to find a bishop named uualchstod mentioned in bede 's history , belonging to the early eighth century ( about a.d. 730 ) ; for he was 'bishop of those beyond severn ' , that is of hereford , such a name could not become used as a baptismal name until it had become first used as a 'nickname ' or occupational name , and that would not be likely to occur except in a time and region of communications between peoples of different language .