Cydnee
Feminine form of Sidney, itself derived from the surname Sydney of uncertain meaning.
Name Census estimates that about 922 living Americans carry the first name Cydnee. The name is used almost exclusively for girls. The average person named Cydnee today is around 26 years old, and the year with the single highest number of Cydnee births was 1997 (51 babies).
This page is the full Name Census profile for Cydnee. 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
922
~ 1 in 371,751 Americans
Peak year
1997
51 babies that year
Average age
26
years old
2022 SSA rank
#10,570
Tracked since 1949
Popularity
Cydnee: popularity over time
The SSA tracks Cydnee from the 1940s through to the 2020s, spanning 8 decades of birth certificate data. The biggest single decade for the name was the 1990s, with 360 total registrations. Usage has dropped considerably from its 1990s peak. The most recent decade brought in only a fraction of the registrations that the name once attracted.
Babies born per year
Decades
Cydnee 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 Cydnee during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Cydnees live
The SSA's state-level files cover 6 states and territories. Texas, California, Ohio recorded the most babies named Cydnee, while Missouri, Illinois, Utah recorded the fewest. The average across all reporting states is about 16 registrations each.
Origin
Meaning and history of Cydnee
The name Cydnee is a relatively modern variant of the name Sydney, which itself is an English derivation of the French name Sidonie. The name Sidonie has its roots in the ancient Greek name Sidonia, which was derived from the word "Sidon," referring to the ancient Phoenician city of Sidon, located in modern-day Lebanon.
Sidon was an important maritime city in the ancient world, and its name was often used as a personal name among the Phoenicians and Greeks. The name Sidonia was likely adopted by the Greeks as a way of honoring the city and its cultural significance.
The earliest recorded use of the name Sidonia dates back to the 4th century BC, when it was mentioned in ancient Greek texts and inscriptions. In the centuries that followed, the name spread throughout the Mediterranean region and eventually made its way to Europe.
One of the earliest known individuals with the name Sidonia was Sidonia of Poitiers, a 5th-century Gallo-Roman saint who was martyred for her Christian faith. Another notable bearer of the name was Sidonia of Saxony, a 12th-century German noblewoman who was the wife of Albert the Bear, the first Margrave of Brandenburg.
As the name evolved and spread throughout Europe, it underwent various spelling and pronunciation changes, eventually leading to the English variant Sydney. The earliest recorded use of the name Sydney dates back to the 16th century, when it was used as both a masculine and feminine name.
One of the most famous individuals with the name Sydney was Sir Philip Sidney, an English poet, courtier, and soldier who lived from 1554 to 1586. Another well-known bearer of the name was Sydney Parkinson, an 18th-century Scottish botanical illustrator who accompanied Captain James Cook on his first voyage to the Pacific.
The name Cydnee is a more recent variation of Sydney, likely emerging in the late 20th century as a way to create a more unique and modern spelling of the name. While not as widely used as the traditional spellings of Sydney or Sidonie, Cydnee has gained some popularity in recent decades, particularly in English-speaking countries.
Notable individuals with the name Cydnee include Cydnee Sampson, an American actress and model; Cydnee Michaels, an American professional wrestler; and Cydnee Black, an American singer and songwriter.
People
Cydnee + last name combinations
How many people share a full name with Cydnee as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with C
Other first names starting with C with a similar number of bearers.
FAQ
Cydnee: questions and answers
How many people in the U.S. are named Cydnee?
Name Census puts the figure at roughly 922 living Americans. We arrive at this by taking every SSA birth registration for Cydnee 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 371,751 US residents.
Is Cydnee a common name?
We classify Cydnee as "Very Rare". It ranks above 89.6% of all first names in the SSA dataset by living bearers. Across the full history of the data, 953 babies have been registered with this name.
When was Cydnee most popular?
The single biggest year for Cydnee was 1997, when 51 babies received the name. The fact that the average living Cydnee is about 26 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
Is Cydnee a female name?
Yes, 100.0% of people registered as Cydnee 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.