Alfonso IX , King of León

  General Notes:

Alfonso IX had 2 wives and many mistresses with whom he had 18 known children.

  Research Notes:

My information and source can be found at Foundation for Medieval Genealogy

Alfonso married Berenguela of Castile, daughter of Alphonso VIII , King of Castile and Princess Eleanor Plantagenet. (Berenguela of Castile was born in 1180 and died on 8 Nov 1246.)