Namesakes
Fictional Characters from Television:
1 character
Rosemary Mason 1996 Silent Witness 
Notable Actors and Actresses:
3 actresses
June Whitfield (a.k.a. Rosemary) 1925-2018
Rosemary Clooney 1928-2002
Rosemary Forsyth 1943-
Notable Musicians:
1 singer
Rosemary Clooney 1928-2002
Notable Writers:
1 author
Rose Tremain (a.k.a. Rosemary) 1943-
Olympic Medalists:
1 silver
(silver) Rosemary Lassig 1960 swimming - 4x100 m medley relay
Other Royalty:
1 queen consort
Camilla, Queen consort of the United Kingdom (a.k.a. Rosemary) 2022- United Kingdom
Title Characters:
3 songs, 1 film/tv show
(song) Rosemary 1969 Why Didn't Rosemary?
(song) Rosemary 1975 Lily, Rosemary and the Jack of Hearts
(song) Rosemary 2011 Dear Rosemary
(film/tv show) Rosemary 1968; 2014 Rosemary's Baby