Cassidie
A feminine name of Celtic origin meaning "curly-haired".
Name Census estimates that about 453 living Americans carry the first name Cassidie. The name is used almost exclusively for girls. The average person named Cassidie today is around 25 years old, and the year with the single highest number of Cassidie births was 1998 (31 babies).
This page is the full Name Census profile for Cassidie. 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
453
~ 1 in 756,632 Americans
Peak year
1998
31 babies that year
Average age
25
years old
2017 SSA rank
#11,868
Tracked since 1981
Popularity
Cassidie: popularity over time
The SSA tracks Cassidie from the 1980s through to the 2010s, spanning 4 decades of birth certificate data. The biggest single decade for the name was the 2000s, with 186 total registrations. Although the numbers have come down from the 2000s peak, Cassidie remains solidly in use and shows no sign of disappearing from maternity wards.
Babies born per year
Decades
Cassidie 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 Cassidie during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Cassidies live
Origin
Meaning and history of Cassidie
The name Cassidie is believed to have originated as a feminine form of the ancient Roman name Cassidius. Cassidius was derived from the Latin word "cassida," which referred to a type of helmet or head covering worn by soldiers in ancient times. The name Cassidius likely indicated strength, protection, or a connection to the military.
In the early centuries of the Roman Empire, the name Cassidius was occasionally bestowed upon male children, though it was not a particularly common name. Records from this period are scarce, but there are mentions of individuals with the name Cassidius in various inscriptions and official documents.
As the Roman Empire expanded and its influence spread, the name Cassidius began to appear in other regions, sometimes with slight variations in spelling or pronunciation. In parts of Gaul (modern-day France), for example, the name may have been rendered as Cassidie or Cassidié.
One of the earliest known individuals to bear a variation of this name was Cassidie of Carthage, a Christian martyr who lived in the 3rd century AD. According to historical accounts, Cassidie was a young woman who refused to renounce her faith during the persecution of Christians under the Roman Emperor Valerian. She was executed for her beliefs, and her story became a source of inspiration for early Christians.
In the Middle Ages, the name Cassidie gained some popularity among certain noble families in parts of Europe. Notable examples include Cassidie de Montfort (c. 1145-1198), a noblewoman from France who was involved in the Third Crusade, and Cassidie of Brabant (c. 1215-1273), a Countess of Holland and Zeeland.
During the Renaissance period, the name Cassidie appeared occasionally in various literary works and historical records. One notable figure was Cassidie Borgia (1499-1519), an Italian noblewoman and daughter of the infamous Lucrezia Borgia. Cassidie Borgia was known for her beauty and intelligence, and she was involved in various political intrigues of the time.
In the 17th and 18th centuries, the name Cassidie remained relatively uncommon, but it did appear in some historical records and literary works. For example, Cassidie de la Baume (1618-1689) was a French noblewoman and author who wrote a memoir detailing her experiences during the Fronde, a series of civil wars in France.
Overall, while not a widely popular name throughout history, Cassidie and its variations have been present in various cultures and time periods, often associated with nobility, strength, and resilience. Its origins in the ancient Roman name Cassidius have given it a sense of historical significance and a connection to the military heritage of the Roman Empire.
People
Cassidie + last name combinations
How many people share a full name with Cassidie 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
Cassidie: questions and answers
How many people in the U.S. are named Cassidie?
Name Census puts the figure at roughly 453 living Americans. We arrive at this by taking every SSA birth registration for Cassidie 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 756,632 US residents.
Is Cassidie a common name?
We classify Cassidie as "Very Rare". It ranks above 83.6% of all first names in the SSA dataset by living bearers. Across the full history of the data, 464 babies have been registered with this name.
When was Cassidie most popular?
The single biggest year for Cassidie was 1998, when 31 babies received the name. The fact that the average living Cassidie is about 25 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
Is Cassidie a female name?
Yes, 100.0% of people registered as Cassidie 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.