He is married to Berengaria of Castile.
They got married October 1197 at Valladolid, Spain, he was 26 years old.Source 5
Name: Alfonso Leon marriage date: Oct 1197 marriage place: Valladolid, Spain birth date: 1171 birth place: Zamora, Leon, Spain death date: 24 Sep 1230 death place: Lisboa, Lisboa, Portugal/ Ancestry.com
Name: Alfonso Leon burial place: Santiago de Compostela, Galicia, Spain death date: 24 Sep 1230 birth date: 1171 birth place: Zamora, Leon, Spain/ Ancestry.com
Name: Alfonso Leon death date: 24 Sep 1230 residence date: 1600-1890 residence place: USA/ Ancestry.com
Name: Alfonso Leon death date: 24 Sep 1230/ Ancestry.com
Name: Alfonso IX King of Leon death date: 24 Sep 1230 marriage date: Oct 1197 marriage place: Valladolid, Spain birth date: 1171 birth place: Zamora, Leon, Spain/ Ancestry.com
Name: Alfonso Leon/ Ancestry.com