Question: Who is Enguerrand Iv De Coucy's paternal grandfather?
Sentence (from "Enguerrand III, Lord of Coucy"): Enguerrand III de Boves, Lord of Coucy (c.1182–1242) was the eldest son and successor of Ralph I, Lord of Coucy (c. 1134 – 1191) and Alix de Dreux.
Relevant evidence: Yes