Casi
Casi was not among the names given to 5 or more girls in 2025. Its best year was 1986, when it ranked 2031st; the most babies were born in 1989 (56). More babies were named Casi in the 1980s than in any other decade.
Meaning (as Cassie) pet form of Cassandra · English, Greek
- Rank in 2025
- Not rankedgirls
- Babies in 2025
- 0girls
- Girls and boys
- Almost always a girl’s name2021–2025
- Peak year
- 198956 babies
- Total since 1880
- 1,080babies recorded
What does the name Casi mean?
Casi is a spelling of Cassie, pronounced the same way, so it shares Cassie's meaning and origin.
Cassie is a pet form of Cassandra (and sometimes of Cassidy), made with the ending -ie. Cassandra is the Trojan princess of Greek legend who could foretell the future but was never believed. DMNES calls the Greek name of uncertain origin: one part may come from the word for "man", and scholars have proposed other roots meaning "excel" or "raise". Cassie was most popular in the US in the 1980s.
Κασσάνδρα (Ancient Greek, “Kassandra, of uncertain origin”)
How sure is this? Well established. Cassie is clearly a pet form; the meaning of Cassandra is uncertain.
Related names: Cassandra, Cass, Cassidy, Kassie.
See also: Greek names.
Sources for this meaning
- Wiktionary, entry 'Cassie', Wiktionary (Wikimedia Foundation)
- Dictionary of Medieval Names from European Sources, ed. S. L. Uckelman, Edition 2023 no. 1, s.v. 'Cassandra', DMNES (Durham University)
- Wikipedia, 'Cassie', Wikipedia (Wikimedia Foundation)
Casi popularity since 1880
| Year | Rank (girls) | Babies (girls) |
|---|---|---|
| 2025 | — | — |
| 2020 | — | — |
| 2010 | — | — |
| 2000 | #8,661 | 11 |
| 1990 | #2,408 | 51 |
| 1980 | #2,287 | 43 |
| 1970 | #4,264 | 13 |
| 1960 | — | — |
| 1950 | — | — |
| 1940 | — | — |
| 1930 | — | — |
| 1920 | — | — |
| 1910 | — | — |
| 1900 | — | — |
| 1890 | — | — |
| 1880 | — | — |
How popular is Casi, counting every spelling?
Casi is a spelling of Cassie, a name family that ranked #931 for girls in 2025 once every spelling is counted together. Together these spellings went to 265 girls in 2025.
| Spelling | Babies 2025 | Official rank | Babies 2021–2025 |
|---|---|---|---|
| Cassie | 175 | #1,280 | 925 |
| Kassie | 55 | #3,010 | 225 |
| Kassey | 6 | #14,047 | 58 |
| Kassi | 9 | #10,494 | 39 |
| Kasie | 9 | #10,493 | 38 |
| Casie | 6 | #13,533 | 38 |
| Cassi | 5 | #15,382 | 31 |
Spellings count together when they sound the same in American English and are used for the same sex; nicknames and forms that sound different (such as Theo and Theodore) are kept apart. How we group spellings.
How old are people named Casi?
About 1,000 people born in the US named Casi are alive today, with a median age of 39; half are between 34 and 46. That makes Casi mostly worn by adults in their thirties to fifties.
Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.
Casi by state
How common Casi was among girls born in each state in 1987–1991, around its peak. In 48 states fewer than five girls a year got the name, too few for SSA to publish, so those states show as zero.
Names with a similar history
These names rose and fell in step with Casi: their share of US girls followed the most similar curve since 1880. If you like Casi, they share its era and feel.
Questions about the name Casi
What does Casi mean?
Casi is a spelling of Cassie, which means “pet form of Cassandra” (English, Greek origin). Certainty: well established.
How popular is the name Casi?
Casi was not among the names given to 5 or more girls in 2025. Its best year was 1986, when it ranked 2031st; the most babies were born in 1989 (56). More babies were named Casi in the 1980s than in any other decade.
Is Casi a boy or girl name?
In 2021–2025, almost always a girl’s name given the name Casi in the US.
Where was Casi most popular?
In 1987–1991, Casi was most common in Texas (0.03 per 1,000 girls), followed by Ohio and Florida.