Ferdinand I

1 of 3

biographical name (1)

Fer·​di·​nand I ˈfər-də-ˌnand 

1016(or 1018)–1065 the Great king of Castile (1035–65); of León (1037–65)

Ferdinand I

2 of 3

biographical name (2)

1503–1564 Holy Roman emperor (1558–64)

Ferdinand I

3 of 3

biographical name (3)

1861–1948 king of Bulgaria (1908–18)