Ildefonso
Every Ildefonso since 1917 — 392 of them. Popularity, births, and rankings for each year, from official Social Security records.
The story of Ildefonso
Ildefonso is not currently in use for newborns in the United States — fewer than five babies received the name in 2025. Its story lives in the historical record below.
Since 1917, 392 American babies have been named Ildefonso. Its peak came in 1976, when 16 newborns received the name — the signature sound of the 1970s.
The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Ildefonso stood among all boys' names in any year, or use the compare tool to plot it against other names.
Ildefonso year by year
Every year since 2001, and five-year steps back to 1880. Rank is within each sex.
| Year | Boys | Boys rank |
|---|---|---|
| 2025 | — | — |
| 2024 | — | — |
| 2023 | — | — |
| 2022 | 5 | #13,074 |
| 2021 | — | — |
| 2020 | — | — |
| 2019 | — | — |
| 2018 | — | — |
| 2017 | — | — |
| 2016 | — | — |
| 2015 | — | — |
| 2014 | — | — |
| 2013 | — | — |
| 2012 | — | — |
| 2011 | 5 | #13,038 |
| 2010 | — | — |
| 2009 | — | — |
| 2008 | 5 | #13,283 |
| 2007 | — | — |
| 2006 | 6 | #11,167 |
| 2005 | 5 | #12,108 |
| 2004 | 5 | #12,033 |
| 2003 | 7 | #9,024 |
| 2002 | — | — |
| 2001 | 6 | #9,725 |
| 2000 | — | — |
| 1995 | — | — |
| 1990 | 7 | #6,709 |
| 1985 | 8 | #4,870 |
| 1980 | 5 | #6,645 |
| 1975 | 8 | #4,094 |
| 1970 | 5 | #5,032 |
| 1965 | 6 | #3,696 |
| 1960 | 8 | #3,195 |
| 1955 | — | — |
| 1950 | — | — |
| 1945 | — | — |
| 1940 | 5 | #3,682 |
| 1935 | — | — |
| 1930 | — | — |
| 1925 | — | — |
| 1920 | — | — |
| 1915 | — | — |
| 1910 | — | — |
| 1905 | — | — |
| 1900 | — | — |
| 1895 | — | — |
| 1890 | — | — |
| 1885 | — | — |
| 1880 | — | — |
Famous people named Ildefonso
- Ildefonso Falcones Writer · b. 1959
Ranked by global fame across Wikipedia editions (Pantheon project, MIT).
Frequently asked questions
How popular is the name Ildefonso in 2025?
Ildefonso did not appear in the 2025 Social Security data, which means fewer than five babies received the name that year.
How many people are named Ildefonso?
392 babies have been named Ildefonso in the United States since 1917, based on Social Security card applications.
When was the name Ildefonso most popular?
Ildefonso peaked in 1976, when 16 newborns received the name.
Is Ildefonso a boy or girl name?
Ildefonso is overwhelmingly a boy's name — 100% of babies with the name.
Is the name Ildefonso rising or falling?
Ildefonso has been roughly stable over the past decade.
Who are famous people named Ildefonso?
Well-known people named Ildefonso include Ildefonso Falcones (writer).