Ferdinand IV
# Ferdinand IV

Ferdinand IV is the name of:

* Ferdinand IV of Castile (1285–1312), king of Castile and León from 1295
* Ferdinand IV of Germany (1633–1654, king of the Romans from 1653, of Bohemia from 1646, of Hungary from 1647)
* Ferdinand IV of Naples (1751–1825, king 1759–1799; 1799–1806; 1815–1816) (Ferdinand III of Sicily 1759–1816)
* Ferdinand IV of Tuscany (1835–1908, grand-duke 1859–1860)
