Yes this is a fairly difficult one justina. The abbesses you mention were all in famous association with Boniface, but the two I am looking for were mother and daughter. The daughter is well known for a certain set of letters that had invited the interest of scholars in Anglo Saxon writers. She writes in the style of the vernacular tradition. The writings also are associated with a kind of spiritual crisis that was particulary noticed in this daughter's writings, since she most probably wrote them after the deaths of her mother and other kinsmen and women that had accompaned the Boniface mission.