Sydnei
Sydnei was last recorded in 2020, when 8 babies were given it; 635 Americans have been recorded with it between 1988 and 2020 (Social Security Administration, published May 2026).
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Sydnei by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Sydnei?
Unranked in 2025
Its last girls’ rank on record is #12,022, in 2020; SSA lists a name only in years with 5 or more births.
37 babies in 2005, the peak
Sydnei peaked in 2005, when 37 girls were given it, #3,933 among girls’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2020 | 8 | #12,022 | 4.9 |
| 2019 | 5 | #17,680 | 3.0 |
| 2018 | 6 | #15,457 | 3.5 |
| 2017 | 14 | #8,248 | 8.1 |
| 2016 | 12 | #9,363 | 6.8 |
| 2015 | 14 | #8,384 | 7.8 |
| 2014 | 16 | #7,596 | 9.0 |
| 2013 | 11 | #10,166 | 6.3 |
| 2012 | 14 | #8,574 | 7.9 |
| 2011 | 19 | #6,817 | 10.8 |
Every recorded year (33)
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2010 | 19 | #6,873 | 10.7 |
| 2009 | 23 | #6,066 | 12.5 |
| 2008 | 30 | #4,993 | 15.9 |
| 2007 | 16 | #8,049 | 8.3 |
| 2006 | 31 | #4,674 | 16.3 |
| 2005 | 37 | #3,933 | 20.0 |
| 2004 | 36 | #3,977 | 19.6 |
| 2003 | 26 | #4,923 | 14.2 |
| 2002 | 20 | #5,873 | 11.1 |
| 2001 | 30 | #4,188 | 16.7 |
| 2000 | 25 | #4,767 | 13.8 |
| 1999 | 27 | #4,291 | 15.2 |
| 1998 | 29 | #4,006 | 16.4 |
| 1997 | 28 | #3,992 | 16.1 |
| 1996 | 34 | #3,417 | 19.4 |
| 1995 | 27 | #3,957 | 15.4 |
| 1994 | 17 | #5,677 | 9.5 |
| 1993 | 14 | #6,576 | 7.7 |
| 1992 | 8 | #10,358 | 4.3 |
| 1991 | 15 | #6,212 | 8.0 |
| 1990 | 9 | #9,155 | 4.7 |
| 1989 | 7 | #10,696 | 3.8 |
| 1988 | 8 | #9,141 | 4.5 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Sydnei a boy’s or a girl’s name?
Sydnei has been recorded only for girls: SSA lists no boys with the name in 33 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Sydnei: the SSA national file counts each sex separately.
How many people are named Sydnei, and how old are they?
An estimated 627 Americans named Sydnei and born in the U.S. are alive in 2026 (99% of everyone recorded); the median is 23 years old and half are between 17 and 29. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 565 people named Sydnei (544 women and girls, 21 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 623 born in the U.S. The Census count is 9% below that prediction.
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 208,920 babies since 1880, Sydnei is the seventh most given (<1% of them). In 2025 none of their 924 babies recorded by SSA was a Sydnei (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 Sydnei
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 Sydnei and names like it
- Compare Sydnei and SydneyBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2000sSydnei peaked in 2005.
- Texas’s most given namesThe state where SSA recorded the most babies named Sydnei since 1910.
- The top names of 2005The year the most babies were named Sydnei.
- The names of Generation ZMost people named Sydnei alive today were born 1997-2012.
- Names starting with SMost given first.