How Many People Are Named Caius?
people named Caius are alive in the United States today (estimate)
About 1 in 147,830 people in the US has this name
Based on 2,329 babies named Caius in Social Security records from 1994 to 2025, and the share of each birth year still alive in 2025.
Popularity Rank
💎💎 Very Rare
Peak Year
254 births
Trend
Stable (last 10 years)
📖 Name Origin & Meaning
Meaning:
Roman variant of GAIUS.
Source of the meaning, origin, pronunciation and related names: Behind the Name.
⚧ Gender Distribution
All of the babies given the name Caius in the records were boys.
👥 Age Distribution
The average person named Caius alive today is about 7 years old, and 100% are under 30. Half of them were between 2 and 11 in 2025.
📈 Popularity Over Time
Caius first appears in the records in 1994, and 2025 was its biggest year so far, with 254 babies.
Babies given the name each year, 1994 to 2025
🏆 Rank History
Caius has never been one of the 100 most popular boys' names. Its best rank was #927, in 2025. In 2025 it ranked #927.
| Boys | |
|---|---|
| Rank in 2025 | #927 |
| Best rank | #927 (2025) |
| Years in the top 100 | None |
| Rank in its biggest decade | #1,536 in the 2010s |
📍 State-Wise Distribution
People named Caius alive today, by the state where they were born (estimate; state records start in 1910).
More people named Caius were born in California than in any other state: about 249 of those alive today. Compared with the national rate in the same years, Caius was given 1.7 times as often in California, 1.6 times in Ohio and 1.5 times in Pennsylvania.
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