Kasimir \k(a)-si-mir\ as a boy's name is pronounced KAZ-e-meer. It is of Slavic origin, and the meaning of Kasimir is "famous destroyer (of peace)". Variant of Casimir (Slavic) "bring peace". The name of the patron saint of Poland; also a favored name of Polish royalty. See also Casimir.

Kasimir has 4 variant forms: Kaz, Kazimierz, Kazimir and Kazmer.

Baby names that sound like Kasimir are Kasimiro, Casmir and Casimiro.