Unknown
Girl name · #3251 in 2025 · Very rare
In 2025, 48 baby girls were named Unknown, placing it at #3251 in the official national rankings. A decade ago it stood at #3595, so the name has been rising over the past ten years. Roughly one in every 37,500 girls born in 2025 was named Unknown.
The 139-year story
Unknown first appears in the Social Security records in 1886, when 5 girls received the name. Its peak came in 1954, when 644 girls were named Unknown — good for #336 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 Unknown per year. Source: SSA.
Unlock the 5-year forecast and compare Unknown against up to 5 other names.
Uniqueness: will there be another Unknown in class?
On our rarity read — which blends how common Unknown is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Unknown will likely be the only one in the room, with the occasional spelling-out as the price.
Where Unknown is most common
State-level data for Unknown 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 Unknown
Statistically, parents drawn to Unknown tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Kathlyn, Marilynn, Ronni, Perri, and Bronwyn.
KathlynMarilynnRonniPerriBronwynJaneyCarolynnJacquelyn
Rank history (last 25 years)
| Year | Babies named Unknown | Rank |
|---|---|---|
| 2025 | 48 | #3249 |
| 2024 | 38 | #3892 |
| 2023 | 46 | #3428 |
| 2022 | 52 | #3123 |
| 2021 | 49 | #3250 |
| 2020 | 42 | #3546 |
| 2019 | 53 | #3043 |
| 2018 | 66 | #2610 |
| 2017 | 47 | #3346 |
| 2016 | 37 | #3996 |
| 2015 | 43 | #3595 |
| 2014 | 72 | #2497 |
| 2013 | 68 | #2597 |
| 2012 | 64 | #2734 |
| 2011 | 77 | #2395 |
| 2010 | 65 | #2726 |
| 2009 | 84 | #2316 |
| 2008 | 62 | #2855 |
| 2007 | 31 | #4675 |
| 2006 | 16 | #7482 |
| 2005 | 25 | #5113 |
| 2004 | 20 | #5969 |
| 2003 | 30 | #4307 |
| 2002 | 18 | #6129 |
| 2001 | 28 | #4321 |
Frequently asked questions
Is Unknown a popular girl name?
Unknown ranked #3251 among girls in 2025 with 48 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #3595.
When was the name Unknown most popular?
Unknown peaked in 1954, when 644 American girls received the name (ranked #336 that year). Since 1954 the name has declined from that high.
How rare is the name Unknown?
In 2025, roughly 1 in 37,500 newborn American girls was named Unknown. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
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.