Noah Boy
NOH-uh
“rest, comfort” · Hebrew
#2
Casimiro
BoySpanish, Polish· “Spanish form of Casimir”
- Meaning
- Spanish form of Casimir
- Origin
- Spanish, Polish
- Pronunciation
- kah-see-MEE-roh
- Syllables
- 4
- US rank 2025
- #10,908
- US babies 2025
- 6
- Best rank
- #803 (1881)
- Peak year
- 1921
Meaning and origin of Casimiro
Casimiro is a Spanish and Polish name that is usually said to mean “Spanish form of Casimir”.
Casimiro is the Spanish, Italian and Portuguese form of Casimir, the Polish Kazimierz. The Slavic name joins kazic, to destroy or proclaim, with mir, peace or world, and it is often explained as proclaimer of peace, though some read it as destroyer of peace. Several kings of Poland bore the name, including Casimir the Great, and Saint Casimir, a fifteenth-century Polish prince, is the patron saint of Poland and Lithuania. It is said kah-see-MEE-roh. Casi and Miro are possible nicknames. Casimiro has a noble, old-world character.
Popularity over time
Casimiro first appears in US Social Security records in 1881. It has ranked in the top 1,000 in 1 different years, starting in 1881. Its best national rank was #803 in 1881, and the most babies received it in 1921, when 28 were named Casimiro. In 2025, 6 babies were named Casimiro, and it ranked #10,908 nationally.
Its national rank moved from #2,355 in 1920, #2,800 in 1950, #5,620 in 1980, #5,627 in 2000, and #10,908 in 2025. Of the 1,084 US boys named Casimiro since records began, 16% were born in the 1920s, its biggest decade. The 1950s come next, with 115 babies. Since 2010, 54 more have been named Casimiro.
Other boys' names that peaked around the same time include Burgess, Hamp, Constantino, Berl, and Cephus.
Gender, sound and spelling
In the US it is used almost only for boys.
Casimiro is usually pronounced kah-see-MEE-roh, with four syllables. It has eight letters, starts with C and ends in “-ro”.
Middle names for Casimiro
A few middle names that flow with Casimiro: each avoids a matching first letter, a rhyme and a vowel clash where the names meet.
Sibling names for Casimiro
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Lists that include Casimiro
Frequently asked questions
What does the name Casimiro mean?
Casimiro is a Spanish and Polish name that is usually said to mean “Spanish form of Casimir”.
What is the origin of the name Casimiro?
Casimiro has Spanish, Polish, and Slavic roots. Casimiro is the Spanish, Italian and Portuguese form of Casimir, the Polish Kazimierz.
Is Casimiro a popular name?
Not especially. Casimiro ranked #10,908 in the US in 2025, which puts it outside the top 1,000.
Is Casimiro a boy or girl name?
Casimiro is mainly a boy's name. In the US it is used almost only for boys.
How do you pronounce Casimiro?
Casimiro is usually pronounced kah-see-MEE-roh. Stressed syllables are in capital letters.
Popularity figures come from US Social Security card applications (names given to at least five babies in a year, 1880 to 2025). How we source names and meanings