Dillyn
Dillyn was last recorded in 2023, when 11 babies were given it; 634 Americans have been recorded with it between 1991 and 2023 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Dillyn by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Dillyn?
Unranked in 2025
Its last boys’ rank on record is #12,691, in 2023; SSA lists a name only in years with 5 or more births.
32 babies in 2003, the peak
Dillyn peaked in 2003, when 32 babies were given it (20 boys, #4,146 among boys’ names). It was not recorded in 2025.
Births by sex.
| Year | Girls | Girls’ rank | Boys | Boys’ rank |
|---|---|---|---|---|
| 2023 | 6 | #13,887 | 5 | #12,691 |
| 2022 | 7 | #12,587 | under 5 | |
| 2021 | 7 | #12,536 | under 5 | |
| 2020 | 10 | #9,739 | 5 | #12,519 |
| 2019 | 9 | #10,696 | under 5 | |
| 2018 | 12 | #8,750 | 8 | #9,038 |
| 2017 | 7 | #13,079 | under 5 | |
| 2016 | 12 | #9,033 | 8 | #9,053 |
| 2015 | 13 | #8,581 | 14 | #6,068 |
| 2014 | 17 | #7,080 | under 5 |
Every recorded year (33)
| Year | Girls | Girls’ rank | Boys | Boys’ rank |
|---|---|---|---|---|
| 2013 | 19 | #6,538 | 8 | #8,993 |
| 2012 | 8 | #12,531 | 11 | #7,179 |
| 2011 | 7 | #13,741 | 17 | #5,253 |
| 2010 | 9 | #11,513 | 16 | #5,546 |
| 2009 | 11 | #10,166 | 17 | #5,383 |
| 2008 | 10 | #11,019 | 18 | #5,116 |
| 2007 | 12 | #9,706 | 19 | #4,857 |
| 2006 | 10 | #10,804 | 19 | #4,727 |
| 2005 | 5 | #17,210 | 19 | #4,509 |
| 2004 | 11 | #9,422 | 18 | #4,639 |
| 2003 | 12 | #8,658 | 20 | #4,146 |
| 2002 | 8 | #11,412 | 20 | #4,067 |
| 2001 | under 5 | 18 | #4,336 | |
| 2000 | under 5 | 18 | #4,244 | |
| 1999 | under 5 | 24 | #3,296 | |
| 1998 | under 5 | 23 | #3,314 | |
| 1997 | under 5 | 12 | #5,032 | |
| 1996 | under 5 | 10 | #5,637 | |
| 1995 | under 5 | 13 | #4,585 | |
| 1994 | under 5 | 9 | #5,980 | |
| 1993 | under 5 | 12 | #4,782 | |
| 1992 | under 5 | 18 | #3,484 | |
| 1991 | under 5 | 13 | #4,288 |
Ranks: girls’ names and boys’ names ranked separately in each year’s SSA file; “under 5” is a year SSA did not list the name for that sex.
Is Dillyn a boy’s or a girl’s name?
Of the 634 Americans recorded as Dillyn, 35% are girls and 65% boys.
Years with fewer than 20 babies given the name are left blank.
Girls and boys named Dillyn: the SSA national file counts each sex separately.
How many people are named Dillyn, and how old are they?
An estimated 624 Americans named Dillyn and born in the U.S. are alive in 2026 (98% of everyone recorded); the median is 19 years old and half are between 13 and 25. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 531 people named Dillyn (210 women and girls, 321 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 591 born in the U.S. The Census count is 10% below that prediction. Possible reasons: people who give a short form or another name to the Census, and a survival estimate that can run high.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Names spelled alike
Of these 8 names spelled alike, given to 89,906 babies since 1880, Dillyn is the eighth most given (<1% of them). In 2025 none of their 675 babies recorded by SSA was a Dillyn (SSA lists a name only with 5 or more babies of one sex).
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Dillyn
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Dillyn and names like it
- Compare Dillyn and DillonBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2000sDillyn peaked in 2003.
- The top names of 2003The year the most babies were named Dillyn.
- The names of Generation ZMost people named Dillyn alive today were born 1997-2012.
- Names starting with DMost given first.