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Casimiro

♂ Boy

Pronounced kah-see-MEE-roh /ˌkɑː.siˈmiː.roʊ/Medium

Meaning: The Spanish and Italian form of Casimir, from the Polish Kazimierz, generally 'destroyer of peace' or 'proclaimer of peace' (kazic + mir, 'peace'). Honors St Casimir, patron of Poland and Lithuania, noted respectfully.Low

In 30 seconds: A stately name: Casimiro means 'proclaimer of peace' (said 'kah-see-MEE-roh'). Regal and classic.

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Origin MediumSpanish, Polish

MeaningThe Spanish and Italian form of Casimir, from the Polish Kazimierz, generally 'destroyer of peace' or 'proclaimer of peace' (kazic + mir, 'peace'). Honors St Casimir, patron of Poland and Lithuania, noted respectfully.

U.S. rank (2023)#12538 ↘ Falling

2023 U.S. births5 boys (0.00% of U.S. boys)

Peak year1921

Total births (all-time)≈ 1,078

Popularity in the U.S. · SSA data

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Casimiro is the Spanish/Italian form of Casimir (Polish Kazimierz), generally 'destroyer' or 'proclaimer of peace' (kazic + mir, 'peace'), and honors St Casimir. Stately and rare in the U.S. (said 'kah-see-MEE-roh').

In the U.S. it appears only rarely. Rare, regal, and classic.

Did you know? Casimiro is the Spanish and Italian form of Casimir, from the Polish for 'destroyer' or 'proclaimer of peace' — honoring St Casimir, patron of Poland, noted respectfully (said 'kah-see-MEE-roh').

Overall data confidence 50%

References — Casimiro — Spanish/Italian form of Casimir; 'proclaimer of peace'; St Casimir

Variations

CasimirKazimierzCasimír

Nicknames

CasiMiro

Famous Bearers

Famous bearers coming soon.

If you like Casimiro…

Casimir— the base form

Kazimierz— the Polish original

Cassius— a like classic Cas- name

Maximiliano— a like stately Spanish pick

Explore names like Casimiro

By themespanish regal polish saintly

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Frequently Asked

What does the name Casimiro mean?

Casimiro is the Spanish/Italian form of Casimir, generally 'destroyer' or 'proclaimer of peace'; it honors St Casimir.

How do you pronounce Casimiro?

It's said kah-see-MEE-roh /ˌkɑː.siˈmiː.roʊ/ — four syllables, stress on the third.

Is Casimiro a boy or girl name?

Casimiro is a boy's name.

How popular is Casimiro?

Casimiro is rare in the U.S.