Dillian
Dillian was last recorded in 2021, when 5 babies were given it; 610 Americans have been recorded with it between 1989 and 2021 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Dillian by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Dillian?
Unranked in 2025
Its last boys’ rank on record is #12,617, in 2021; SSA lists a name only in years with 5 or more births.
41 babies in 1992, the peak
Dillian peaked in 1992, when 41 boys were given it, #1,956 among boys’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2021 | 5 | #12,617 | 2.9 |
| 2020 | 6 | #10,954 | 3.5 |
| 2019 | 7 | #10,001 | 3.9 |
| 2018 | 6 | #11,119 | 3.3 |
| 2017 | 7 | #9,948 | 3.8 |
| 2015 | 11 | #7,182 | 5.7 |
| 2014 | 14 | #6,069 | 7.3 |
| 2013 | 12 | #6,714 | 6.3 |
| 2012 | 7 | #9,977 | 3.7 |
| 2011 | 10 | #7,633 | 5.3 |
Every recorded year (31)
| Year | Births | Rank | Per million boys |
|---|---|---|---|
| 2010 | 11 | #7,194 | 5.7 |
| 2009 | 16 | #5,622 | 8.1 |
| 2008 | 16 | #5,553 | 7.8 |
| 2007 | 18 | #5,050 | 8.7 |
| 2006 | 16 | #5,362 | 7.8 |
| 2005 | 22 | #4,086 | 11.0 |
| 2004 | 21 | #4,152 | 10.6 |
| 2003 | 29 | #3,208 | 14.7 |
| 2002 | 27 | #3,282 | 13.9 |
| 2001 | 27 | #3,249 | 13.9 |
| 2000 | 24 | #3,444 | 12.2 |
| 1999 | 31 | #2,738 | 16.1 |
| 1998 | 25 | #3,115 | 13.1 |
| 1997 | 37 | #2,270 | 19.6 |
| 1996 | 34 | #2,340 | 17.9 |
| 1995 | 30 | #2,518 | 15.8 |
| 1994 | 38 | #2,129 | 19.7 |
| 1993 | 38 | #2,098 | 19.4 |
| 1992 | 41 | #1,956 | 20.5 |
| 1991 | 18 | #3,360 | 8.9 |
| 1989 | 6 | #7,216 | 3.0 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Dillian a boy’s or a girl’s name?
Dillian has been recorded only for boys: SSA lists no girls with the name in 31 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Dillian: the SSA national file counts each sex separately.
How many people are named Dillian, and how old are they?
An estimated 596 Americans named Dillian and born in the U.S. are alive in 2026 (98% of everyone recorded); the median is 26 years old and half are between 20 and 31. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 769 people named Dillian (69 women and girls, 700 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 30% above that prediction. Possible reasons: the Census counts people born abroad, whom SSA’s files leave out, and it records the name people give, which SSA may have recorded under another spelling or as part of a compound name.
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 89,249 babies since 1880, Dillian is the eighth most given (<1% of them). In 2025 none of their 675 babies recorded by SSA was a Dillian (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 Dillian
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 Dillian and names like it
- Compare Dillian and DillonBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1990sDillian peaked in 1992.
- Ohio’s most given namesThe state where SSA recorded the most babies named Dillian since 1910.
- The top names of 1992The year the most babies were named Dillian.
- The names of Generation ZMost people named Dillian alive today were born 1997-2012.
- Names starting with DMost given first.