Cydni
A feminine variant of Sidney, possibly alluding to a female resident of Sydney.
Name Census estimates that about 571 living Americans carry the first name Cydni. The name is used almost exclusively for girls. The average person named Cydni today is around 28 years old, and the year with the single highest number of Cydni births was 1996 (37 babies).
This page is the full Name Census profile for Cydni. 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.
For a British comparison, Name Census UK has a UK baby-name profile for Cydni with official rankings and popularity over time.
People living today
571
~ 1 in 600,270 Americans
Peak year
1996
37 babies that year
Average age
28
years old
2021 SSA rank
#11,346
Tracked since 1960
Census
Cydni in the 2020 Census
The 2020 Census recorded 589 people with the first name Cydni, which placed it at #18,321 in the published first-name tables. This is a snapshot of people who already had the name at the time of the Census.
The SSA sections elsewhere on this page answer a different question: how often parents gave the name to babies over time. The "people living today" figure on this page is different again: it is a current estimate built from SSA birth records and age-based survival rates, so the two numbers are not expected to match exactly.
2020 Census rank
#18,321
National first-name rank
People counted
589
589 in the published race/origin table
Per 100,000
0.2
People with this name in 2020
Largest reported group
White
45.0% of people with this name
Demographics
Ancestry and ethnicity for Cydni
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Cydni is White at 45.0%. The next largest groups are Black (41.3%) and Two or More Races (6.6%). These figures describe the people who had the name in 2020, not any inherent property of the name itself.
The bar chart below shows how people with the first name Cydni described their own race and ethnicity on the 2020 Census form. The Census Bureau groups responses into six broad categories: White, Black or African American, Hispanic or Latino, Asian and Pacific Islander, American Indian and Alaska Native, and Two or More Races. When a category has too few respondents for a given name, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown so the breakdown is easy to read across every published category. Because the 2020 Census first-name file also includes raw headcounts for each group, Name Census can show those alongside the percentages in the legend and hover tooltip.
Keep in mind that these are self-reported numbers. A first name does not determine a person's race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the name Cydni at the time of the 2020 Census, not any inherent property of the name itself.
- White45.0% · 265
- Black or African American41.3% · 243
- Two or more races6.6% · 39
- Hispanic or Latino4.8% · 28
- Asian and Pacific Islander1.5% · 9
- American Indian and Alaska Native0.8% · 5
Popularity
Cydni: popularity over time
The SSA tracks Cydni from the 1960s through to the 2020s, spanning 7 decades of birth certificate data. The biggest single decade for the name was the 1990s, with 251 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
Cydni 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 Cydni during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Cydnis live
Origin
Meaning and history of Cydni
The name Cydni is a relatively modern variant spelling of the female name Cynthia, which has its origins in ancient Greek mythology. Cynthia was an epithet of the Greek moon goddess Artemis, derived from Mount Cynthus on the island of Delos, where she was born.
The name Cynthia first appeared in literature in the works of the Roman poet Propertius, who wrote in the 1st century BC. He used the name to refer to a woman he loved, likely inspired by the moon goddess. Over time, the name gained popularity among the ancient Romans and Greeks.
One of the earliest recorded individuals with the name Cynthia was Cynthia Calventia, a Roman woman who lived in the 1st century AD and was mentioned in an inscription found in Pompeii. Another notable early bearer of the name was Cynthia, the wife of the Roman poet Propertius, who was the subject of his famous elegies.
In the Middle Ages, the name Cynthia fell out of favor, but it experienced a revival during the Renaissance period, particularly in England. One of the earliest recorded English women with the name was Cynthia, the daughter of Sir Walter Raleigh, who was born in the late 16th century.
During the 17th and 18th centuries, the name Cynthia became associated with literature and poetry. It was used as a character's name in works by authors such as Edmund Spenser and John Dryden. The name also appeared in the writings of Alexander Pope, who used it to personify the moon in his poem "The Rape of the Lock."
In more recent history, the variant spelling Cydni emerged as a modern form of the name. One of the earliest notable individuals with this spelling was Cydni Lauper, an American singer-songwriter and actress born in 1953. She is best known for her hit songs "Girls Just Want to Have Fun" and "Time After Time."
Other notable individuals with the name Cydni include Cydni Moree, an American model and actress born in 1985, and Cydni Tetro, an American professional wrestler born in 1986. Additionally, Cydni Wilkes is an American basketball player who has competed in the WNBA since 2018.
People
Cydni + last name combinations
How many people share a full name with Cydni 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
Cydni: questions and answers
How many people in the U.S. are named Cydni?
Name Census puts the figure at roughly 571 living Americans. We arrive at this by taking every SSA birth registration for Cydni 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 600,270 US residents.
Is Cydni a common name?
We classify Cydni as "Very Rare". It ranks above 85.8% of all first names in the SSA dataset by living bearers. Across the full history of the data, 590 babies have been registered with this name.
When was Cydni most popular?
The single biggest year for Cydni was 1996, when 37 babies received the name. The fact that the average living Cydni is about 28 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
How common was Cydni in the 2020 Census?
The published 2020 Census first-name tables recorded 589 people with the name Cydni, or 0.20 per 100,000 residents. That placed it at #18,321 in the national Census ranking for first names.
Why is the Census count different from the living estimate?
Because they measure different things. The Census figure is a count of people who had the name Cydni in 2020. The living estimate aims to answer a current question instead: how many people with the name are alive today, based on SSA birth records and age-based survival rates. Since one number is a 2020 snapshot and the other is a present-day estimate, they are not expected to be identical.
What does the Census say about the gender split for Cydni?
In the 2020 Census sex table, Cydni appears almost entirely female. Of the 598 people counted with this name, 99.2% were female and only a very small share were male. The Census view is a snapshot of people living with the name in 2020, while the SSA section above tracks births across time.
What does the Census say about the background of people named Cydni?
In the 2020 Census race and Hispanic-origin table, the largest reported group for people named Cydni is White at 45.0%. The next largest groups are Black (41.3%) and Two or More Races (6.6%). These figures describe the people who had the name in 2020, not any inherent property of the name itself. The percentages in the chart above come from self-reported race and Hispanic-origin responses in the 2020 Census.
Which group reports the name Cydni most often in the Census?
White is the largest reported group for people named Cydni in the 2020 Census, accounting for 45.0% (265 people in the published table).
Why can the Census sex total and race total differ slightly?
The Census Bureau published separate 2020 tables for sex and for race/Hispanic origin, and the released figures can differ slightly because of privacy protection in the public files. That is why this page treats the gender section and the race/origin section as two related snapshots instead of forcing them into one identical total.
Does every first name have Census demographic data?
No. The public Census first-name release only includes names that met the Bureau's publication rules, so many rarer names in the SSA files have no Census demographic snapshot. When that happens, the SSA trend, gender history, and state sections still appear, but the 2020 Census demographic sections are omitted.
What does the SSA popularity chart show?
The chart tracks births, not the number of people alive with the name today. Each point shows how many babies were given the name Cydni in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Cydni a female name?
Yes, 100.0% of people registered as Cydni 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.
Is Cydni still being used today?
Yes. The SSA still recorded Cydni in 2024, and the page above shows its latest-year rank where available. A name can be well past its peak and still remain in steady use, especially if it built up a large population over earlier decades.
Why can a name have a lot of living bearers even if it is not trendy now?
Because living-bearer counts and current baby-name popularity measure different things. A name like Cydni can build up a very large population over many decades, even if fewer parents are choosing it now than they did at its peak.
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.
How many people are called Cydni?
You can see how many people have the name Cydni on our sister site HowManyOfMe.org — same data roots, lighter UI.