According to this, Alfonso and Juana had twins:
-Fernando Alfonso de Valencia (1316-1384).Maestre electo de la Orden de Santiago y heredero de la Casa de Valencia
-Alfonso Fernández de Valencia (1316-1365). Obispo de Zamora
https://es.wikipedia.org/wiki/Alfonso_de_Valencia#Matrimonios_y_des...
Why does this tree say they had 1 son and his name is listed as Fernando Antonio de Castilla y Castro?
Where is the reference material to support this?
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