Namesakes
American Presidents:
1 president
Gerald Ford (a.k.a. Rudolph) 1974-1977 
Austrian Dukes and Emperors:
3 dukes, 1 archduke
Duke Rudolf I (a.k.a. Rudolph) 1278-1282
Duke Rudolf III (a.k.a. Rudolph) 1298-1307
Duke Rudolf IV the Founder (a.k.a. Rudolph) 1358-1365
Archduke Rudolf II (a.k.a. Rudolph) 1576-1608
Bohemian Kings:
2 kings
King Rudolf I (a.k.a. Rudolph) 1306-1307
King Rudolf II (a.k.a. Rudolph) 1576-1611
Dutch Prime Ministers:
1 prime minister
Johan Rudolph Thorbecke 1849-1853; 1862-1866; 1871-1872
Frankish and French Kings:
1 king
King Rudolf Duke of Burgundy (a.k.a. Rudolph) 923-936
German Kings and Holy Roman Emperors:
1 king, 1 king-emperor
King Rudolf I (a.k.a. Rudolph) 1273-1291
King-Emperor Rudolf II (a.k.a. Rudolph) 1575-1612
Hall-of-Famers:
1 basketball
(basketball) Rudy Tomjanovich 2020
Hungarian Kings and Queens:
1 king
King Rudolf II (a.k.a. Rudolph) 1576-1608
Nobel Prize Winners:
1 chemistry
(chemistry) Rudolph A. Marcus 1992
Notable Actors and Entertainers:
1 actor
Rudolph Valentino 1895-1926
Notable Writers:
1 author
Rudolph Fisher 1897-1934
Rock and Roll Hall-of-Famers:
2 musicians
Rudy Lewis (a.k.a. Rudolph) 1988 The Drifters
Rudolph Isley 1992 The Isley Brothers
Saints:
1 blessed, 1 saint
Saint Rudolph ?-1066
Blessed Rodolfo Acquaviva (a.k.a. Rudolph) 1550-1583
Tolkien's Characters:
1 character
Rudolph Bolger (m)