Casimir
Boy name · #2038 in 2025 · Uniqueness 41/100
Casimir is currently the #2038 boy name in the United States — 73 babies received it in 2025. A decade ago it stood at #3299, so the name has been rising over the past ten years. Roughly one in every 24,658 boys born in 2025 was named Casimir.
Babies named Casimir per year, 1880–2025. Source: SSA.
The 131-year story
Casimir first appears in the Social Security records in 1894, when 5 boys received the name. Its peak came in 1919, when 220 boys were named Casimir — good for #394 that year. Today's parents encounter it as a name from their grandparents’ generation, which is precisely the vintage window from which names get revived. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Unlock the 5-year forecast and compare Casimir against up to 5 other names.
Uniqueness: will there be another Casimir in class?
Casimir scores 41 out of 100 on our uniqueness scale, which blends current rarity with five-year momentum — putting it in the "distinctive" band. That middle band is the sweet spot many parents hunt for: recognizable without being everywhere.
Where Casimir is most common
Geography matters for names, and Casimir is no exception. In 2025 the states with the most Casimirs were NY (8), CO (5), PA (5). Raw counts naturally favor populous states, but the spread still hints at where the name is part of the local naming culture.
Names like Casimir
Statistically, parents drawn to Casimir tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Crawford, Charley, Meyer, Warner, and Clement.
CrawfordCharleyMeyerWarnerClementHarlandFlorianWilmer
Rank history (last 25 years)
| Year | Babies named Casimir | Rank |
|---|---|---|
| 2025 | 73 | #2035 |
| 2024 | 59 | #2370 |
| 2023 | 58 | #2362 |
| 2022 | 58 | #2408 |
| 2021 | 40 | #3021 |
| 2020 | 29 | #3653 |
| 2019 | 29 | #3716 |
| 2018 | 31 | #3524 |
| 2017 | 24 | #4224 |
| 2016 | 29 | #3681 |
| 2015 | 34 | #3299 |
| 2014 | 31 | #3456 |
| 2013 | 37 | #2998 |
| 2012 | 23 | #4251 |
| 2011 | 22 | #4356 |
| 2010 | 24 | #4099 |
| 2009 | 22 | #4429 |
| 2008 | 28 | #3744 |
| 2007 | 25 | #4011 |
| 2006 | 15 | #5525 |
| 2005 | 23 | #3941 |
| 2004 | 23 | #3860 |
| 2003 | 14 | #5271 |
| 2002 | 23 | #3670 |
| 2001 | 11 | #6013 |
Frequently asked questions
Is Casimir a popular boy name?
Casimir ranked #2038 among boys in 2025 with 73 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #3299.
When was the name Casimir most popular?
Casimir peaked in 1919, when 220 American boys received the name (ranked #394 that year). Since 1919 the name has declined from that high.
How rare is the name Casimir?
In 2025, roughly 1 in 24,658 newborn American boys was named Casimir. It scores 41/100 on our uniqueness scale (rarity blended with momentum), which we classify as "distinctive".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.