Namesakes
American First Ladies:
1 first lady
Frances Cleveland (a.k.a. Clara) 1886-1889; 1893-1897 
Fictional Characters from Television:
1 character
Clara Oswald 1963 Doctor Who
Hurricanes and Tropical Storms:
1 hurricane
Hurricane Clara 1977
Notable Actors and Entertainers:
3 actors
Virginia Mayo (a.k.a. Clara) 1920-2005
Clara Khoury 1976-
Clara Rugaard 1997-
Notable Musicians:
2 singers, 1 composer
Clara Schumann 1819-1896
Patti Page (a.k.a. Clara) 1927-2013
Clara Nunes 1942-1983
Notable Writers:
1 author
Claribel Alegría (a.k.a. Clara) 1924-2018
Olympic Medalists:
1 bronze
(bronze) Clara Basiana 2012 synchronized swimming - team
Other Notables:
1 person
Clara Barton 1821-1912 nursing
Saints:
1 blessed
Blessed Chiara Gambacorta of Pisa (a.k.a. Clara) 1362-1419