"Variant of Casimir"
The name Casimira is commonly a female name from the "Slavic" origin.
Casimira is the feminine form of Casimir, the English spelling of Polish Kazimierz. The Slavic second element is mir, meaning peace; the corresponding Polish feminine form is Kazimiera, and Casimira is also recorded in Spanish, Portuguese and Italian use. The name is therefore a feminine variant of an established Slavic name rather than an independent coinage.
Casimir means "Peace is announced.".
The pronunciation of Casimira is kah-sih-MEE-rah.