Namesakes
Fictional Characters from Song Titles:
1 character
(character) Riley 1992 The Life Of Riley 
Fictional Characters from Television:
4 characters
Riley Finn 1997 Buffy the Vampire Slayer
Riley Adams 2000 CSI: Crime Scene Investigation
Riley Ward 2001 McLeod's Daughters
Riley Dawson 2008 Terminator: The Sarah Connor Chronicles
Hall-of-Famers:
1 ice hockey
(ice hockey) Riley Hern 1962
Notable Actors and Entertainers:
1 actor
Riley Voelkel 1990-
Notable Musicians:
1 musician
B.B. King (a.k.a. Riley) 1925-2015
Notable Politicians and Statespeople:
1 politician
Thomas R. Marshall (middle name Riley) 1854-1925
Olympic Medalists:
1 bronze/silver/gold, 1 silver
(silver) Frank Castleman (middle name Riley) 1904 200 m hurdles
(bronze/silver/gold) Michael Galitzen (middle name Riley) 1928; 1932 diving - platform; diving - springboard
Rock and Roll Hall-of-Famers:
1 musician
B.B. King (a.k.a. Riley) 1987