Infanta dona Costança DE PORTUGAL
- Born: 3 Jan 1289/90, Lisboa, Portugal
- Married: 23 Jan 1302, Valladolid, Spain
- Died: 17 Nov 1313, Sahagun, León, Spain
 Research Notes:
The Nobiliario of Pedro Conde de Barcelos names "D. Alonso, D. Constança" as the children of "D. Dionis…Rey de Portugal" and his wife "D. Isabel". The Chronicon Domini Joannis Emmanuelis records the marriage in Jan 1302 of “Rex Dns Fernandus in Valleoleti cum Regina Dna Constantia, filia Regis Portugaliæ”.
The Chronicon Domini Joannis Emmanuelis records the death in Nov 1313 of “Regina Dna Constantia in Sancto Facundo”. 1
Marriage Information:
Costança married Infante don Fernando IV "el Ajurno" DE CASTILLA y León, son of Infante don Sancho IV "el Bravo" DE CASTILLA y Léon and María Alfonso "la Grande" DE MOLINA, on 23 Jan 1302 in Valladolid, Spain. (Fernando DE CASTILLA was born 6 Dec 1285 in Sevilla, Spain and died 7 Sep 1312 in Jaén, Spain.)
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