Namesakes
Fictional Characters from Books:
1 villain
Lord Voldemort (a.k.a. Riddle) 1997 Harry Potter and the Philosopher's Stone 
Harry Potter Characters:
3 characters
Mary Riddle
Tom Riddle
Lord Voldemort (a.k.a. Riddle)
Olympic Medalists:
1 silver
(silver) Mike Riddle 2014 freestyle skiing