Cydni
Cydni was last recorded in 2021, when 8 babies were given it; 590 Americans have been recorded with it between 1960 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 Cydni by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Cydni?
Unranked in 2025
Its last girls’ rank on record is #11,346, in 2021; SSA lists a name only in years with 5 or more births.
37 babies in 1996, the peak
Cydni peaked in 1996, when 37 girls were given it, #3,157 among girls’ names. It was not recorded in 2025.
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2021 | 8 | #11,346 | 4.9 |
| 2020 | 5 | #15,655 | 3.1 |
| 2016 | 7 | #13,221 | 4.0 |
| 2014 | 5 | #17,160 | 2.8 |
| 2013 | 9 | #11,222 | 5.1 |
| 2012 | 6 | #15,401 | 3.4 |
| 2011 | 20 | #6,391 | 11.4 |
| 2010 | 11 | #9,933 | 6.2 |
| 2009 | 17 | #7,410 | 9.3 |
| 2008 | 13 | #9,076 | 6.9 |
Every recorded year (38)
| Year | Births | Rank | Per million girls |
|---|---|---|---|
| 2007 | 17 | #7,464 | 8.8 |
| 2006 | 11 | #10,058 | 5.8 |
| 2005 | 18 | #6,600 | 9.7 |
| 2004 | 25 | #5,093 | 13.6 |
| 2003 | 30 | #4,326 | 16.4 |
| 2002 | 25 | #4,795 | 13.9 |
| 2001 | 17 | #6,382 | 9.4 |
| 2000 | 21 | #5,348 | 11.6 |
| 1999 | 30 | #3,906 | 16.9 |
| 1998 | 31 | #3,744 | 17.5 |
| 1997 | 28 | #3,916 | 16.1 |
| 1996 | 37 | #3,157 | 21.1 |
| 1995 | 27 | #3,899 | 15.4 |
| 1994 | 17 | #5,492 | 9.5 |
| 1993 | 23 | #4,417 | 12.7 |
| 1992 | 24 | #4,263 | 13.0 |
| 1991 | 20 | #4,836 | 10.7 |
| 1990 | 14 | #6,189 | 7.4 |
| 1989 | 16 | #5,339 | 8.7 |
| 1988 | 9 | #7,829 | 5.1 |
| 1985 | 13 | #5,418 | 7.6 |
| 1979 | 5 | #10,522 | 3.1 |
| 1978 | 5 | #10,069 | 3.3 |
| 1968 | 5 | #7,207 | 3.0 |
| 1966 | 5 | #6,769 | 3.0 |
| 1965 | 5 | #6,708 | 2.8 |
| 1961 | 6 | #5,961 | 3.0 |
| 1960 | 5 | #6,536 | 2.5 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Cydni a boy’s or a girl’s name?
Cydni has been recorded only for girls: SSA lists no boys with the name in 38 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Cydni: the SSA national file counts each sex separately.
How many people are named Cydni, and how old are they?
An estimated 578 Americans named Cydni and born in the U.S. are alive in 2026 (98% of everyone recorded); the median is 27 years old and half are between 21 and 33. An estimate from SSA’s births and life tables, not a count.
The 2020 Census counted 598 people named Cydni (593 women and girls, 5 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 569 born in the U.S. The Census count is 5% above 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).
How common is the spelling Cydni?
Cydni is a less common spelling of Sydney: SSA has recorded 590 Cydni and 187,700 Sydney since 1880.
Of these 7 names spelled alike, given to 195,061 babies since 1880, Cydni is the fourth most given (<1% of them). In 2025 none of their 902 babies recorded by SSA was a Cydni (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 Cydni
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 Cydni and names like it
- Compare Cydni and SydneyBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1990sCydni peaked in 1996.
- Texas’s most given namesThe state where SSA recorded the most babies named Cydni since 1910.
- The top names of 1996The year the most babies were named Cydni.
- The names of Generation ZMost people named Cydni alive today were born 1997-2012.
- Names starting with CMost given first.