Namesakes
Fictional Characters from Books:
1 character, 1 villain
Catherine Linton (a.k.a. Cathy) 1847 Wuthering Heights 
Cathy Ames 1952 East of Eden
Fictional Characters from Song Titles:
2 characters
(character) Cathy 1960 Cathy's Clown
(character) Cathy 2014 Cathy
Fictional Characters from Television:
1 character
Cathy Gale 1961 The Avengers
Hall-of-Famers:
1 basketball
(basketball) Cathy Rush 2008
Notable Actors and Entertainers:
2 actors
Cathy Moriarty 1960-
Cathy Tyson 1965-
Notable Athletes:
1 track
(track) Cathy Freeman 1973-
Olympic Medalists:
3 gold, 1 silver/gold
(gold) Cathy Ferguson 1964 swimming - 100 m backstroke; swimming - 4x100 m medley relay
(gold) Cathy Carr 1972 swimming - 100 m breaststroke; swimming - 4x100 m medley relay
(gold) Cathy Boswell 1984 basketball
(silver/gold) Cathy Freeman 1996; 2000 400 m