Namesakes
Hall-of-Famers:
1 ice hockey
(ice hockey) Joe Mullen 2000 
Notable Actors and Entertainers:
1 actor
Marie Mullen 1953-
Notable Athletes:
1 ice hockey
(ice hockey) Joe Mullen 1957-
Rock and Roll Hall-of-Famers:
1 musician
Larry Mullen Jr. 2005 U2
Tony Award Winners:
1 actress
(actress) Marie Mullen 1998 The Beauty Queen of Leenane