Editing Alfonso IX of León (section)

=== Marriages and legitimate issue ===
In 1191, Alfonso married his first cousin [[Theresa of Portugal, Queen of León|Theresa of Portugal]],{{sfn|Echols|Williams|1992|pp=400-401}} who was his mother's brother's daughter. Theresa was the daughter of King [[Sancho I of Portugal]] and Queen [[Dulce of Aragon]].{{sfn|Fernandes Marques|2008|pp=62, 87}} The marriage was annulled five years later, on grounds of consanguinity but three children had been born by then, being:
* [[Sancha, heiress of León|Sancha]] (1191{{snd}}before 1243){{sfn|Fernandes Marques|2008|pp=89, 140}} unmarried and without issue. She and her sister Dulce became nuns or retired to the monastery of San Guillermo Villabuena in León, where she died before 1243.
* [[Ferdinand of León (died 1214)|Ferdinand]] (1192/1193{{snd}}1214),{{sfn|Fernandes Marques|2008|p=140}} unmarried and without issue.
* [[Dulce of León|Dulce]] (1193/1194{{snd}}1248).{{sfn|Fernandes Marques|2008|p=140 y 143}}

On 17 November 1197, Alfonso IX married his first cousin once removed, the ''infanta'' [[Berengaria of Castile]]. Berengeria was the daughter of King Alfonso VIII of Castile and his wife Queen [[Leonor of England]]. Her paternal grandfather, [[Sancho III of Castile]], had been a brother of Alfonso's own father [[Ferdinand II of León]]. Thus, both Alfonso IX and Berengaria belonged to the same dynasty or family. The marriage was annulled on grounds of consanguinity, but not before five children had been born, namely:
* Eleanor{{sfn|Martínez Díez|2007|p=47}} (1198{{sfn|Flórez|1761|p=348}}{{snd}}11 November 1202{{sfn|Flórez|1761|p=348}}).
* Constance (died in 1242),{{sfn|Flórez|1761|p=355}} became a nun at the [[Abbey of Santa María la Real de Las Huelgas]], [[Burgos]], where she died.{{sfn|Martínez Díez|2007|p=47}}
* [[Ferdinand III of Castile]] (1199/1201{{efn|King Fernando's year of birth is not recorded. According to the ''Chrónica latina de los reyes de Castilla'', he was 16 years old when he became king of Castile in 1217 which would mean that he was born in 1201. [[Rodrigo Jiménez de Rada]], a contemporary of Fernando, said that he was 18 years old in 1217 which would indicate that his birth was in 1199, two years after his parents' marriage.{{sfn|Rodríguez López|2004|p=30}}{{sfn|Flórez|1761|pp=347-348}}}}{{snd}}1252). King of Castile in 1217 after the death of Henry I of Castile and of [[Kingdom of León|León]]  in 1230 after the death of his father.{{sfn|Martínez Díez|2007|p=47}}
* [[Alfonso of Molina|Alfonso]]  (died in 1272), Lord of [[Molina de Aragón|Molina]] ''jure uxoris'' due to his first marriage to Mafalda González de Lara.{{sfn|Martínez Díez|2007|p=47}}
* [[Berengaria of León]] (died in 1237), in 1224 married [[John of Brienne]],{{sfn|Martínez Díez|2007|p=47}}