 Beorhtwulf was married to Sæthryth , apparently a figure of some importance in her own right as she witnessed all of his charters between 840 and 849 , after which she disappears from the record . Beorhtwulf is said to have had two sons , Beorhtfrith and Beorhtric . Beorhtric is known from witnessing his father 's charters , but he ceased to do so before the end of Beorhtwulf 's reign . 
