Proclaimer of peace
Derived from the Slavic elements 'kazati' meaning to proclaim or destroy and 'miru' meaning peace or world. It has been a traditional royal name in Poland for centuries, famously borne by several kings and a patron saint.
About 6 boys were named Kasimir in 2025.
US births per 5-year period, 1990–present (SSA data).
Influential avant-garde painter and art theoretician
Patron saint of Poland and Lithuania
Physical chemist who discovered the element protactinium
