Namesakes
Fictional Characters from Books:
1 character
Bill Compton (a.k.a. Erasmus) 2001 The Southern Vampire Mysteries 
Fictional Characters from Television:
2 characters
Erasmus Jones 1994; 1996 Touched by an Angel; Promised Land
Bill Compton (a.k.a. Erasmus) 2008 True Blood
Other Royalty:
1 prince
Philipp of Liechtenstein (a.k.a. Erasmus) 1946- Liechtenstein
Saints:
1 saint
Saint Erasmus of Formia ?-303