As his first wife, Boniface intended to marry an unnamed woman who had been betrothed to his brother, Anselm, before his death. In 1079 Pope Gregory VII commissioned the bishops of Turin, Asti and Alba to convince Boniface del Vasto not to marry the woman, because her betrothal to his brother created a relationship of affinity between them. Boniface is sometimes said to have married Alice of Savoy, the daughter of
Peter of Savoy. This is unlikely, however, since Boniface and Alice were first-cousins-once-removed (Boniface's mother Bertha and Alice's grandmother
Adelaide were sisters), and thus far too closely related to be permitted to marry according to canon law. Boniface married Agnes, daughter of
Hugh, Count of Vermandois. ==Issue==