Enrique, son of John II of Castile and Maria of Aragon, married Blanche of Navarre. They had no children, so he divorced her and married Juana of Portugal.
Juana gave birth to a daughter who was suspected to be an illegitimate child and this led to a succession war, but what if the marriage was happy and the couple already had children?
Maria (b. 1443-?)
Juan (b. 1446-?)
Blanca (b. 1449-?)
Enrique (b. 1452-?)
Charles of Viana may not have died to prevent Castile from claiming the crown of Navarre
I'm not sure if King Juan II would marry Isabella of Portugal here
Juana gave birth to a daughter who was suspected to be an illegitimate child and this led to a succession war, but what if the marriage was happy and the couple already had children?
Maria (b. 1443-?)
Juan (b. 1446-?)
Blanca (b. 1449-?)
Enrique (b. 1452-?)
Charles of Viana may not have died to prevent Castile from claiming the crown of Navarre
I'm not sure if King Juan II would marry Isabella of Portugal here