Guillaume d'Auvergne

-https://fmg.ac/Projects/MedLands/AUVERGNE.htm#GuyAuvergnedied989A

(d) GUILLAUME . "Wido princeps Arvernorum" donated "ecclesiam...in vico...Biliomo" to Sauxillanges, for the souls of "Stephani episcopus...patris mei Rotberti et matris mee Ingelberge et fratris mei Rotberti", by charter dated Aug "feria quarta regnante Lothario rege Francorum", subscribed by "domni Widoni principis...Willelmi fratris eius...Aucende uxoris eiusdem domni Widoni"[121].