Mama Cosma is a character on the Nickelodeon cartoon show "Fairly OddParents" (a pun on "fairy godparents"). She is Cosmo's sadistic mother, and is always coming up with evil schemes to take Cosmo away from Timmy and Wanda.
Like the male Italian name Nicola, Cosma is sometimes used as a girls' name in Germany. A famous example is the daughter of the German singer Nina Hagen, Cosma Shiva Hagen.
https://www.behindthename.com/name/cosma/top/brazil
https://forebears.io/x/forenames/cosma
https://www.popular-babynames.com/name/cosma
According to the USA Social Security Administration, 9 girls were born with the name Cosma in 1919.
https://www.nancy.cc/baby-name/cosma/
https://www.names.org/n/cosma/about
A notable Feminine name bearer is a German-American actress: Cosma Shiva Hagen.
https://en.wikipedia.org/wiki/Cosma_Shiva_Hagen
A fictional Feminine name bearer is Mama Cosma, Mother of Cosmo from Fairly OddParents
https://fairlyoddparents.fandom.com/wiki/Mama_Cosma
The user-submitted name: https://www.behindthename.com/name/cosma/submitted