Namesakes
Notable Explorers and Adventurers:
1 explorer
Hernando de Soto (a.k.a. Ferdinando) c. 1496-1542 
Olympic Medalists:
1 gold
(gold) Ferdinando Gandolfi 1992 water polo
Other Royalty:
3 kings
Vittorio Emanuele II of Italy (middle name Ferdinando) 1861-1878 Italy
Umberto I of Italy (middle name Ferdinando) 1878-1900 Italy
Vittorio Emanuele III of Italy (middle name Ferdinando) 1900-1946 Italy
Saints:
2 blessed
Blessed Ferdinando Maria Baccilieri 1821-1893
Blessed Grimoaldo of the Purification (a.k.a. Ferdinando) 1883-1902
Spanish Kings and Queens:
1 king
King Amadeo I of Savoy (middle name Ferdinando) 1870-1873