Namesakes
Fictional Characters from Plays and Musicals:
1 character
Roberta 1933 Roberta 
Fictional Characters from Television:
3 characters
Roberta "Summer" Quinn 1989 Baywatch
Roberta Kittleson 1997 The Practice
Bobbie Morganstern 2004 Joey
Grammy Award Winners:
1 best new artist, 1 record of the year
(best new artist) Bobbie Gentry (a.k.a. Roberta) 1968
(record of the year) Roberta Flack 1973; 1974 The First Time Ever I Saw Your Face; Killing Me Softly with His Song
Notable Actors and Entertainers:
3 actors
Vivian Vance (a.k.a. Roberta) 1909-1979
Raffaella Carrà (a.k.a. Roberta) 1943-2021
Roberta Taylor 1948-
Notable Athletes:
1 tennis
(tennis) Roberta Vinci 1983-
Notable Musicians:
2 singers, 1 musician
Roberta Flack 1937-
Raffaella Carrà (a.k.a. Roberta) 1943-2021
Joni Mitchell (a.k.a. Roberta) 1943-
Olympic Medalists:
1 bronze
(bronze) Roberta Brunet 1996 5000 m
Rock and Roll Hall-of-Famers:
1 musician
Joni Mitchell (a.k.a. Roberta) 1997