Namesakes
Fictional Characters from Books:
1 character
Isabelle de Merteuil 1782 The Dangerous Liaisons 
Harry Potter Characters:
1 character
Fleur Delacour (a.k.a. Isabelle)
Notable Actors and Actresses:
2 actresses, 1 model
Isabelle Huppert 1953-
Isabelle Adjani 1955-
Inès de La Fressange (a.k.a. Isabelle) 1957-
Notable Athletes:
1 basketball
(basketball) Isabelle Yacoubou 1986-
Notable Musicians:
1 singer
France Gall (a.k.a. Isabelle) 1947-2018
Olympic Medalists:
2 bronze, 1 gold, 1 silver
(bronze) Isabelle White 1912 diving - platform
(bronze) Isabelle Daniels 1956 4x100 m relay
(gold) Isabelle Chartrand 2002 ice hockey
(silver) Isabelle Yacoubou 2012 basketball
Saints:
1 blessed
Blessed Isabelle of France 1225-1270