Casimir
Boy name · #2038 in 2025 · Very rare
How old is the name Casimir? In official American birth records, Casimir has been tracked continuously since 1894, giving it 131 years of documented American history.
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: Official national birth records.
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
How old is the name Casimir?
In official American birth records, the name Casimir first appeared in 1894 (over 131 years ago), when 5 newborn boys received the name. It has over a century of continuous American history.
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: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.