The Chronicon Gaufredi Vosiensis names "Bosonem" as son of "Guillermum". The cartulary of Tulle St Martin records a donation by "Arcambaldus vicecomes de Comborn" dated May [1085] subscribed by "Ebali vicecomitis de Ventedorn fratris sui, Bernardi Bellimontis fratris sui, Bosoni vicecomitis de Torenna consanguinei sui".
Vicomte de Turenne. "Boso vicecomes de Torena cum uxore mea…Comptores" donated "alodium nostrum…inter castrum Torenæ et montem…Vetula Torena" to Uzerche by charter dated 1074[1452].
The cartulary of Tulle St Martin records a donation by "Boso…vicecomes…in Jerusalem quando obiit" dated 1091. 2
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