historyofroyalwomen.com
The Year of Isabella I of Castile - The rivalry with Joanna la Beltraneja (Part one) - History of Royal Women
In any case, it took until 1462 before Joan gave birth to a daughter named Joanna. A few days later, little Joanna was baptised, and her ten-year-old aunt Isabella acted as one of her godmothers.
Moniek Bloks