Casimir
Boy name · #2038 in 2025 · Very rare
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. 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?
On our rarity read — which blends how common Casimir is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Casimir will likely be the only one in the room, with the occasional spelling-out as the price.
Where Casimir is most common
State-level data for Casimir is too sparse in 2025 to rank by rate — in most states its count falls below the SSA's per-state reporting threshold (counts under 5 are withheld).
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. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
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.