Isidore
Boy name · #3584 in 2025 · Uniqueness 48/100
Isidore is currently the #3584 boy name in the United States — 31 babies received it in 2025. A decade ago it stood at #7066, so the name has been rising over the past ten years. Roughly one in every 58,065 boys born in 2025 was named Isidore.
The 144-year story
Isidore first appears in the Social Security records in 1881, when 6 boys received the name. Its peak came in 1919, when 183 boys were named Isidore — good for #435 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.
Babies named Isidore per year, 1880–2025. Source: SSA.
Unlock the 5-year forecast and compare Isidore against up to 5 other names.
Uniqueness: will there be another Isidore in class?
Isidore scores 48 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 Isidore is most common
State-level data for Isidore is sparse in 2025 — the name's footprint is too small for most states to report (the SSA suppresses counts under 5 per state for privacy).
Names like Isidore
Statistically, parents drawn to Isidore tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Hartley, Judge, Casimir, Florian, and Alphonse.
HartleyJudgeCasimirFlorianAlphonseJuneHarlandHenderson
Rank history (last 25 years)
| Year | Babies named Isidore | Rank |
|---|---|---|
| 2025 | 31 | #3583 |
| 2024 | 33 | #3455 |
| 2023 | 34 | #3416 |
| 2022 | 16 | #5633 |
| 2021 | 31 | #3582 |
| 2020 | 11 | #7034 |
| 2019 | 20 | #4806 |
| 2018 | 26 | #3993 |
| 2017 | 14 | #6060 |
| 2016 | 11 | #7157 |
| 2015 | 11 | #7066 |
| 2014 | 15 | #5733 |
| 2013 | 13 | #6241 |
| 2012 | 5 | #12274 |
| 2011 | 7 | #9600 |
| 2010 | 8 | #8803 |
| 2009 | 5 | #12491 |
| 2008 | 9 | #8324 |
| 2007 | 9 | #8173 |
| 2006 | 5 | #12055 |
| 2005 | 7 | #9115 |
| 2004 | 6 | #9948 |
| 2003 | 7 | #8643 |
| 2002 | 10 | #6522 |
| 2000 | 6 | #9112 |
Frequently asked questions
Is Isidore a popular boy name?
Isidore ranked #3584 among boys in 2025 with 31 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #7066.
When was the name Isidore most popular?
Isidore peaked in 1919, when 183 American boys received the name (ranked #435 that year). Since 1919 the name has declined from that high.
How rare is the name Isidore?
In 2025, roughly 1 in 58,065 newborn American boys was named Isidore. It scores 48/100 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.