Question: Who is the maternal grandmother of William I, Count Of Burgundy?
Sentence (from "William I, Count of Burgundy"): William I (1020 – 12 November 1087), called the Great ("le Grand" or "Tête Hardiethe Stubborn"), was Count of Burgundy from 1057 to 1087 and Mâcon from 1078 to 1087.
Relevant evidence: No