Namesakes
Austrian Dukes and Emperors:
1 emperor
Emperor Ferdinand I (a.k.a. Marcelin) 1835-1848 
Bohemian Kings:
1 king
King Ferdinand V (a.k.a. Marcelin) 1835-1848
Hungarian Kings and Queens:
1 king
King Ferdinánd V (a.k.a. Marcelin) 1835-1848