Thirty Years’ War | Summary, Causes, Combatants, Map, & Significance | Britannica

Ferdinand’s future was assured when he came of age, in 1466, and when he was named king of Sicily, in 1468, in order to impress the court of Castile, where his father ultimately wished to place him.

In 1461, in the midst of a bitterly contested succession, John II named him heir apparent and governor of all his kingdoms and lands.

Ferdinand was the son of John II of Aragon and Juana Enríquez, both of Castilian origin