| Alys, Countess of the Vexin (4 October 1160 – c. 1220) was the daughter of King Louis VII of France and his second wife Constance of Castile.[1] She is also known as Alaïs, Adélaïde, Adèle, Alais, or Alix, but is not to be confused with her half-sister Alix of France, the daughter of Louis by his first wife Eleanor of Aquitaine. [edit] Early life Alys was a younger half-sister to Marie and Alix and a younger full sister to Marguerite. Alys's mother died in giving birth to her. Desperate for a male heir, Louis married Adèle of Champagne just five weeks after Constance's death. Five years later came the birth of Alys's half-brother Philip, eventually King of France, and six years later still the birth of Alys's youngest half-sister Agnes, Empress consort of the Byzantine Empire |