Hmmm... It's not much to go on, but here are a few options.
Cecilia, by the way, means "blind". (Cecil is typically the male form)
NAMES THAT MEAN CHEERFUL
Alair, Alanna, Alyanna, Hillary, Ilaria, Bonnie
NAMES THAT MEAN JOY
Abbie, Abigail, Chara
NAMES THAT MEAN FLOWER
Azalea, Clover...