Kasimir
Kasimir was given to 6 boys in 2025, #11,340 among boys’ names; 80 Americans have been recorded with it since 1917 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Kasimir by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Kasimir mean?
Wiktionary, German section
Kasimir is “a male given name from Polish, equivalent to English Casimir”
/ˈkaːzimiɐ̯/
Meaning: Wiktionary, German section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Kasimir?
#11,340 among boys’ names, 2025
Kasimir entered the boys’ rankings after 2015 and stood at #11,340 in 2025.
9 babies in 2021, the peak
Kasimir peaked in 2021, when 9 boys were given it, #8,509 among boys’ names. The 6 births of 2025 are 67% of that peak.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2025 | 6 | #11,340 | 3.5 |
| 2024 | 9 | #8,662 | 5.2 |
| 2023 | 8 | #9,349 | 4.7 |
| 2022 | 8 | #9,426 | 4.6 |
| 2021 | 9 | #8,509 | 5.1 |
| 2012 | 5 | #13,249 | 2.6 |
| 2010 | 5 | #13,292 | 2.6 |
| 2008 | 5 | #13,584 | 2.5 |
| 2003 | 6 | #10,238 | 3.0 |
| 1995 | 5 | #9,592 | 2.6 |
Every recorded year (12)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 1918 | 7 | #3,537 | 6.9 |
| 1917 | 7 | #3,400 | 7.6 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Kasimir a boy’s or a girl’s name?
Kasimir has been recorded only for boys: SSA lists no girls with the name in 12 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Kasimir: the SSA national file counts each sex separately.
How many people are named Kasimir, and how old are they?
An estimated 65 Americans named Kasimir and born in the U.S. are alive in 2026, too few to state an age range. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 118 people named Kasimir (1 woman or girl, 117 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 26 born in the U.S. The Census count is 4.5 times that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Names spelled alike
Of these 5 names spelled alike, given to 7,636 babies since 1880, Kasimir is the fourth most given (1.0% of them). In 2025 it was given to 6 of their 91 babies (6.6%), the third most given that year.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
More about Kasimir and names like it
- Compare Kasimir and CasimirBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2020sKasimir peaked in 2021.
- Polish namesWiktionary’s origin for Kasimir: every such name, by how often it is given.
- The top names of 2021The year the most babies were named Kasimir.
- Names starting with KMost given first.