Question: Who is the paternal grandfather of Henry Of Antioch?
Sentence (from "Henry of Antioch"): Henry of Antioch (b. 1198–1217, d. 18/27 of June, 1276), alternately known as Henri de Poitiers or Henry of Poitiers, was the son of Bohemond IV of Antioch, Prince of Antioch and his first wife Plaisance Embriaco de Giblet.
Relevant evidence: Yes