"Boso comes et uxor sua Constantia…illorum filii…Willelmus comes, Rotbaldus comes, Pontius juvenis" signed the charter dated May [963] under which "Gencius et uxor mea Aiburga" donated property "in pago Aquense superiore ad castrum…Ansoyse" to Monmajour.
Her affiliation is unknown. Chaume proposed that she was Constantia, daughter of Charles Constantin Comte de Vienne, for onomastic reasons only on the basis that names with the root "Constant-" were unknown in western royal genealogy before Charles Constantin himself. This supposition is, however, incorrect as numerous charters of the monastery of Cluny dated between 891 and 946 include the name "Constantia", and many others during the same period the name "Constantius" and "Constantinus". Poly suggests that Constantia, wife of Count Boson, was the sister rather than daughter of Charles Constantin, but this appears to be more difficult to sustain chronologically bearing in mind the birth of her children in the early 950s. 1
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