An original byname Búi, from búa ‘to dwell’, was found in Norway and Iceland as a personal name and byname, but is rare there. In the form Bōi, later Bo, it is very common in Denmark and Sweden, where it appears in several runic inscriptions as bui and is found in the Latin forms Boecius and Boetius. It is possibly found in three Normandy place-names and it is potentially the first element in Boothorpe, Leicestershire.
