Question: Who is Thomas, Count Of Perche's paternal grandfather?
Sentence (from "Geoffrey III, Count of Perche"): Geoffrey III (died 1202), Count of Perche (1191-1202), son of Rotrou IV, Count of Perche, and Matilda of Blois-Champagne, daughter of Theobald II, Count of Champagne, and Matilda of Carinthia.
Relevant evidence: Yes