Namesakes
Fictional Characters from Books:
2 characters, 1 hero
Clarissa Harlowe 1748 Clarissa 
Clarissa Harlowe 1748 Clarissa
Clarissa Dalloway 1925 Mrs Dalloway
Fictional Characters from Television:
1 character
Clarissa Mullery 1996 Silent Witness
Olympic Medalists:
2 bronze
(bronze) Clarissa Davis 1992 basketball
(bronze) Clarissa Chun 2012 wrestling
Other Notables:
1 person
Clara Barton (a.k.a. Clarissa) 1821-1912 nursing