Sydnei
Girls' nameMeaning not yet documented
Sydnei has been given to 635 babies in the U.S. since 1988. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 2005, with 37 recorded.
Babies named Sydnei, 2020
1 in 418,000
Sydnei over time, 1880–2025
Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.
How common is Sydnei?
Sydnei had fewer than 5 recorded uses in 2025, so these figures use 2020, the last year it was published.
- Among all babies, 2020
- 1 in 418,000
- 8 of 3,342,313 births
- Among girls only
- 1 in 202,000
- <0.01% of girls
- Rank, 2020
- Unranked
- Fewer than 5 uses
- Coin-flip room size
- 289,591 kids
- Even odds of a second one
Where Sydnei sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 2020 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 289,591 children born in 2020 and it's an even bet that one of them is another Sydnei. In a class of 30 the chance is Under 1%.
When Sydneis were born
Half of everyone ever recorded as Sydnei was born before 2003 — so the typical Sydnei is around 22 today.
- Biggest decade
- 2000s
- 43.1% of all use
- Born in the last 25 years
- 83.5%
- A modern name
- Recorded since 1950
- 635
- People you could plausibly meet
2000s — 43.1% of all recorded uses (274).
Is Sydnei rising or falling?
Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.
- Rank vs 1 year ago
- —
- Not ranked then
- Rank vs 5 years ago
- New entry
- Not ranked then
- Rank vs 10 years ago
- —
- Not ranked then
- Births vs 10 years ago
- —
- Not published both years
- Share of its own peak
- 0%
- Peak was 2005 (37)
- Years since peak
- 20
- Years
- Year-to-year steadiness
- Volatile
- 29.4% average annual change
Spellings of Sydnei
Sydnei is not the most common spelling — Sydney is, with 77.3% against Sydnei's 0.28%.
Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.
Where Sydnei is used
Across 1910–2025, Sydnei was most concentrated in Georgia — about 1 in — girls, against 1 in 477,277 across all states with data. It was least common in Texas (1 in —).
Shading is the share of that state's recorded girls given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Sydnei has too little recent state data to map, so this covers all years from 1910.
Sydnei by the numbers
The raw record for each sex the name is used for.
Names similar to Sydnei
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Sydnei
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.