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Casimir

“Proclaimer of peace, or by another reading destroyer of peace” — Polish/Slavic origin

Boy's name · #2035 in the US (2025) · Vintage

Casimir has appeared in US records since 1894 — best rank #393 (1917) · 5,248 babies named Casimir all-time · 1 in 25,000 boys born in 2025.

Appears in 2020-2025 birth records of 3 states. See the full state-by-state map on this page.

Famous Casimirs

• Casimir Funk — Jewish-Polish biochemist
• Casimir III the Great — King of Poland from 1333 to 1370
• Casimir IV Jagiellon — King of Poland and Grand Duke of Lithuania
• Casimir I the Restorer — Polish king (1016-1058)
• Casimir II the Just — High Duke of Poland (1138-1194)

In stories & tradition

• Casimir — L'Île aux enfants

What Casimirs become

Among 246 notable people named Casimir:

Business leaders appear 1.93× more often than among typical names — e.g. Casimir Ehrnrooth, Finnish businessman (1931–2015).

Browse more boy names — popularity, trends and eras for 5,700+ American names, free.

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