Hugh IX of Lusignan was a notable nobleman from the House of Lusignan, a prominent family in medieval France. He was born around 1215 and became the lord of Lusignan in Poitou. Hugh IX is best known for his role in the political landscape of the Crusades and his connections to the royal families of England and France. Hugh IX married Isabella of Angoulême, the widow of King John of England, which strengthened his political alliances. He was involved in various conflicts during his lifetime, including disputes over territories in Aquitaine. His legacy is tied to the complex feudal relationships of the time.