(1) He is married to Beatrix Berenger de Provence.
They got married Jan 1245 mf, he was 19 years old.Source 3
They got married on January 31, 1246, he was 20 years old.Child(ren):
(2) He had a relationship with Marguerite de Bourgogne.
Child(ren):
http://trees.ancestry.com/pt/AMTCitationRedir.aspx?tid=26471858&pid=10216/ Ancestry.co.uk