Casi
Spanish diminutive of Casilda meaning "chaste, pure".
Name Census estimates that about 1,019 living Americans carry the first name Casi. The name is used almost exclusively for girls. The average person named Casi today is around 39 years old, and the year with the single highest number of Casi births was 1989 (56 babies).
This page is the full Name Census profile for Casi. 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
1.0K
~ 1 in 336,363 Americans
Peak year
1989
56 babies that year
Average age
39
years old
2022 SSA rank
#15,763
Tracked since 1962
Popularity
Casi: popularity over time
The SSA tracks Casi from the 1960s through to the 2020s, spanning 7 decades of birth certificate data. The biggest single decade for the name was the 1980s, with 444 total registrations. Usage has dropped considerably from its 1980s peak. The most recent decade brought in only a fraction of the registrations that the name once attracted.
Babies born per year
Decades
Casi 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 Casi during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Casis live
The SSA's state-level files cover 6 states and territories. Texas, Florida, Oklahoma recorded the most babies named Casi, while Utah, Ohio, Georgia recorded the fewest. The average across all reporting states is about 18 registrations each.
Origin
Meaning and history of Casi
The name Casi has its origins in the ancient Roman culture, dating back to the early centuries of the Roman Empire. It is derived from the Latin word "castus," which means pure or chaste. The name was initially used as a virtue name, bestowed upon children to symbolize purity and moral integrity.
During the Roman era, the name Casi was relatively uncommon, but it gained prominence in the later years of the empire. One of the earliest recorded instances of the name can be found in the writings of the Roman historian Tacitus, who mentioned a nobleman named Cassius in his annals.
In the Middle Ages, the name Casi saw a resurgence in popularity among the Christian communities of Europe. It was often given to individuals who dedicated their lives to the Church or lived a life of piety and virtue. Several notable figures bore this name during this time, including Casi di Narni, an Italian monk and scholar who lived in the 12th century.
As the Renaissance period dawned, the name Casi continued to hold significance, particularly in Italy. One of the most famous bearers of this name was Casi Buonarroti, the nephew of the renowned artist Michelangelo Buonarroti. Casi Buonarroti was born in 1516 and served as a prominent figure in the Florentine Republic.
In the 17th century, the name Casi gained popularity in Spain, where it was sometimes spelled as "Casio." One notable figure from this era was Casio de Montealegre, a Spanish soldier and explorer who participated in the conquest of Chile in the late 1500s.
Moving forward to the 18th century, the name Casi found its way to the American colonies. One of the earliest recorded instances of the name in the United States was Casi Winslow, a prominent merchant and landowner from Massachusetts, born in 1712.
Throughout history, the name Casi has been associated with various individuals from diverse backgrounds, including scholars, artists, and military figures. While it may not be as common today as it once was, the name remains a testament to the enduring influence of ancient Roman culture and the virtues it sought to uphold.
People
Casi + last name combinations
How many people share a full name with Casi 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
Casi: questions and answers
How many people in the U.S. are named Casi?
Name Census puts the figure at roughly 1,019 living Americans. We arrive at this by taking every SSA birth registration for Casi 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 336,363 US residents.
Is Casi a common name?
We classify Casi as "Rare". It ranks above 90.2% of all first names in the SSA dataset by living bearers. Across the full history of the data, 1,080 babies have been registered with this name.
When was Casi most popular?
The single biggest year for Casi was 1989, when 56 babies received the name. The fact that the average living Casi is about 39 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
Is Casi a female name?
Yes, 100.0% of people registered as Casi 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.