Cassidi
A feminine name meaning "curlyhaired" or "shining, curly hair".
Name Census estimates that about 840 living Americans carry the first name Cassidi. The name is used almost exclusively for girls. The average person named Cassidi today is around 26 years old, and the year with the single highest number of Cassidi births was 1999 (51 babies).
This page is the full Name Census profile for Cassidi. 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
840
~ 1 in 408,041 Americans
Peak year
1999
51 babies that year
Average age
26
years old
2020 SSA rank
#8,496
Tracked since 1977
Popularity
Cassidi: popularity over time
The SSA tracks Cassidi from the 1970s through to the 2020s, spanning 6 decades of birth certificate data. The biggest single decade for the name was the 1990s, with 300 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
Cassidi 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 Cassidi during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Cassidis live
The SSA's state-level files cover 5 states and territories. Texas, California, Florida recorded the most babies named Cassidi, while North Carolina, Utah, Florida recorded the fewest. The average across all reporting states is about 14 registrations each.
Origin
Meaning and history of Cassidi
The name Cassidi has its roots in the ancient Gaelic language of Ireland and Scotland. It is derived from the word "cass," meaning "curly-haired" or "curly," combined with a diminutive suffix, creating a name that translates to "little curly-haired one." This name emerged during the medieval period, originating in the Scottish Highlands and the northern regions of Ireland.
Cassidi was a relatively uncommon name in historical records until the 16th century, when it started appearing more frequently in Scottish and Irish genealogical records. One of the earliest recorded instances was Cassidi MacLeod, a Scottish chieftain from the Isle of Lewis, born in 1542.
In the 17th century, the name gained popularity among the Irish nobility. Notable figures include Cassidi O'Callaghan (1620-1689), an Irish landowner and politician who played a significant role in the Irish Confederate Wars. Another prominent individual was Cassidi O'Donnell (1645-1711), a leader of the O'Donnell clan in County Donegal, Ireland.
As the name spread across the English-speaking world, it underwent various spelling variations, including Cassidy, Kassidy, and Kassidi. One of the most famous bearers of this name was Cassidi Butch Cassidy (1866-1908), the American train robber and outlaw whose exploits with the Wild Bunch Gang became the stuff of legend in the American Old West.
In the 20th century, the name Cassidi gained further recognition with the success of Irish-American actor and singer Jack Cassidy (1927-1976), known for his roles on Broadway and in films like "The Eiger Sanction." Another notable figure was Cassidi Howell (1911-1997), an Australian politician who served as a member of the Australian Senate from 1938 to 1962.
While the name Cassidi has its origins in the Celtic cultures of Ireland and Scotland, it has transcended its historical roots and gained global recognition, embraced by people from diverse backgrounds and cultures. Its unique blend of softness and strength has made it a popular choice for parents seeking a name with a rich heritage and a distinctive character.
People
Cassidi + last name combinations
How many people share a full name with Cassidi 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
Cassidi: questions and answers
How many people in the U.S. are named Cassidi?
Name Census puts the figure at roughly 840 living Americans. We arrive at this by taking every SSA birth registration for Cassidi 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 408,041 US residents.
Is Cassidi a common name?
We classify Cassidi as "Very Rare". It ranks above 88.9% of all first names in the SSA dataset by living bearers. Across the full history of the data, 863 babies have been registered with this name.
When was Cassidi most popular?
The single biggest year for Cassidi was 1999, when 51 babies received the name. The fact that the average living Cassidi is about 26 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
Is Cassidi a female name?
Yes, 100.0% of people registered as Cassidi 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.