Isabella married Hugh X de Lusignan in France, becoming Countess of La Marche.
On May 10, 1220, Isabella of Angoulême married Hugh X de Lusignan, Count of La Marche. This union represented a strategic alliance that King John had once feared would materialize through her earlier arranged marriage. The Lusignans were a powerful family, and this marriage not only restored Isabella to power in France but also secured her sons' territorial claims, further intertwining her lineage with influential noble houses.