Proclaimer of peace
Derived from the Slavic elements 'kazati' (to proclaim or destroy) and 'mir' (peace or world). It has been a traditional royal name in Poland for centuries, famously borne by Saint Casimir, the patron saint of Poland and Lithuania.
Less common today
Casimir isn't in the latest US Top 1000. It last peaked at #2,038 in 2025.
Polish nobleman and American Revolutionary War general
Prince of the Kingdom of Poland and patron saint of Poland
Biochemist who formulated the concept of vitamins
The last King of Poland from the Piast dynasty
US births per 5-year period, 1990–present (SSA data).
