Question: Who is Isabelle De Meulan's paternal grandfather?
Sentence (from "Waleran de Beaumont, 1st Earl of Worcester"): Waleran de Beaumont, Count of Meulan, 1st Earl of Worcester (1104 – 9 April 1166, Preaux), was the son of Robert de Beaumont, 1st Earl of Leicester and Elizabeth de Vermandois, and the twin brother of Robert de Beaumont, 2nd Earl of Leicester.
Relevant evidence: Yes