Sydnei
About 635 American babies have been named Sydnei since 1988, most of them around 2005. It has not appeared in the national data since 2020. About 630 Sydneis are alive in the United States today, and half of them are over 22.
Popularity, 1880–2025
girls named Sydnei
By the numbers
- Total US births
- 635
- Estimated living today
- 630
- Median age today
- 22
- Peak year
- 2005
- Best rank
- 3,876th
- Rank in 2025
- unranked
- First recorded
- 1988
How old the living Sydneis are
born that year still alive today
Of the 635 babies given the name since 1988, about 630 are alive — 99 in every hundred. The dotted line is the median: half were born before 2003 and half after.
An estimate, not a count. SSA births aged forward through SSA cohort life tables, which know nothing about who left the country or arrived in it — so for a name that mostly came to America rather than being born in it, this is a floor rather than a figure. Where you fall among living Americans.
Where Sydnei is most common
Across the country Sydnei is recorded 0.02 times per 100,000 births, so these are the states above that line. Only states with 50 or more recorded Sydneis are ranked here: below that a handful of births makes a rate that moves on chance alone.
Counts favour the big states, which is why the same few lead this list for almost every name.
Births recorded in each state since 1910. A name given to fewer than five babies in one state in one year is not published, so a name's quietest states are missing from this rather than showing zero. Browse names by state.
Names of 2005
The most popular girls’ names the year Sydnei peaked:
Related names
Sydnei against another name
Two names on one chart, with the year one overtook the other.
Try it on yourself
Source: US Social Security Administration, national and state baby-name files, 1880–2025. Counts include only births registered with the SSA, and names with fewer than five births in a year are not published. The living estimate applies SSA cohort life tables to those births; it counts people born in the United States, so it misses anyone who arrived later and anyone who has left.