He is married to Erzsebet (Princess) of CUMANIA aka Elizabeth of BOSNIA; (of KUMANS; des COUMANS).
They got married on 25 Oct 1264; or Circa 1253 - 1256 at Budapest, Hungary, or Medieval States of Cumania, he was 16 years old.Source 2
Child(ren):
http://trees.ancestry.com/pt/AMTCitationRedir.aspx?tid=43335381&pid=6361/ Ancestry.com.au; Ancestry.com.au