Namesakes
Fictional Characters from Television:
1 character
Winnie Cooper (a.k.a. Gwendolyn) 1988 The Wonder Years 
Notable Actors and Entertainers:
1 actor
Mary Carlisle (a.k.a. Gwendolyn) 1914-2018
Notable Writers:
1 author, 1 author/poet, 1 poet/author
Jean Rhys (a.k.a. Gwendolyn) 1890-1979
Gwendolyn B. Bennett 1902-1981
Gwendolyn Brooks 1917-2000
Olympic Medalists:
1 silver, 1 silver/bronze/gold
(silver) Hilda Strike (a.k.a. Gwendolyn) 1932 100 m; 4x100 m relay
(silver/bronze/gold) Gwen Torrence 1992; 1996 200 m; 4x400 m relay; 100 m; 4x100 m relay