In this document, which contains information about bestowals in the area around Bovenden to the Abbey Helmershausen, Bobo of Bovenden is mentioned as one of the witnesses.
Selles dokumendis, mis sisaldab infot annetuste kohta Bovendeni ümbruse piirkonnas Helmershauseni kloostrile, mainitakse Bobo von Bovendenit ühe tunnistajana.