Sydnei
A feminine name of modern English origin meaning "a person from Sydney".
Name Census estimates that about 623 living Americans carry the first name Sydnei. The name is used almost exclusively for girls. The average person named Sydnei today is around 23 years old, and the year with the single highest number of Sydnei births was 2005 (37 babies).
This page is the full Name Census profile for Sydnei. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
People living today
623
~ 1 in 550,167 Americans
Peak year
2005
37 babies that year
Average age
23
years old
2020 SSA rank
#12,019
Tracked since 1988
Popularity
Sydnei: popularity over time
The SSA tracks Sydnei from the 1980s through to the 2020s, spanning 5 decades of birth certificate data. The biggest single decade for the name was the 2000s, with 274 total registrations. Usage has dropped considerably from its 2000s peak. The most recent decade brought in only a fraction of the registrations that the name once attracted.
Babies born per year
Decades
Sydnei by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Sydnei during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Sydneis live
The SSA's state-level files cover 5 states and territories. Texas, Georgia, Louisiana recorded the most babies named Sydnei, while Tennessee, Missouri, Louisiana recorded the fewest. The average across all reporting states is about 11 registrations each.
Origin
Meaning and history of Sydnei
The name Sydnei is believed to have originated as a variant spelling of the English place name Sydney, which itself is derived from an Old English term meaning "dweller by the well-watered land." The earliest recorded use of the name Sydnei dates back to the late 16th century in parts of southern England.
One of the earliest known individuals with the name Sydnei was Sydnei Smith, a 17th century English soldier and Member of Parliament, born in 1598 and died in 1677. Another notable figure was Sydnei Godolphin, the 1st Earl of Godolphin, a leading British politician and military leader who lived from 1645 to 1712.
In the 18th century, Sydnei Parkinson was a renowned English botanist and artist who accompanied Captain James Cook on his first voyage to the Pacific Ocean between 1768 and 1771. Parkinson's botanical illustrations from the expedition were highly influential in the field of natural history.
Moving into the 19th century, Sydnei Morgan was a Welsh writer and educator who lived from 1828 to 1907. Morgan was a prominent figure in the Welsh literary renaissance and played a crucial role in preserving and promoting the Welsh language and culture.
More recently, Sydnei Harbinson was a respected American architect and urban planner who lived from 1920 to 2011. Harbinson was known for her innovative designs and her commitment to creating sustainable and livable urban environments.
While the name Sydnei has ancient roots and a rich history, it remains a relatively uncommon name in modern times, with few notable bearers in recent decades. Its unique spelling and connection to the city of Sydney, Australia, have contributed to its enduring appeal as a given name.
People
Sydnei + last name combinations
How many people share a full name with Sydnei as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with S
Other first names starting with S with a similar number of bearers.
FAQ
Sydnei: questions and answers
How many people in the U.S. are named Sydnei?
Name Census puts the figure at roughly 623 living Americans. We arrive at this by taking every SSA birth registration for Sydnei going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 550,167 US residents.
Is Sydnei a common name?
We classify Sydnei as "Very Rare". It ranks above 86.6% of all first names in the SSA dataset by living bearers. Across the full history of the data, 635 babies have been registered with this name.
When was Sydnei most popular?
The single biggest year for Sydnei was 2005, when 37 babies received the name. The fact that the average living Sydnei is about 23 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
Is Sydnei a female name?
Yes, 100.0% of people registered as Sydnei in the SSA data are female. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.