After his wife Elizabeth of York died in 1503, King Henry VII of England was actually considering marrying his dead son's widow Catherine of Aragon (who was almost 30 years his junior!) What if Henry gets a papal dispensation and marries Catherine and they have a son together, let's call him Ferdinand, Duke of York after Catherine's father. How would history be different with Henry VIII having a half-brother. Who would Henry VIII marry? Who would Prince Ferdinand marry? Could Ferdinand possibly become king? Also, let's say Henry and Catherine have a daughter named Isabella. Who would she marry?