Caius: Meaning of Baby Name Caius

Caius Popularity Snapshot

Across the entire US Social Security Administration record (1880–2024), 2,074 baby boys have been named Caius. The name peaked in 2024 with 205 US births that year (rank #1061). In 2024, ranked #1061 nationally.

Top States for Caius

Based on 1910–2024 US SSA state-level records, the three states with the most Caius births are: California (197), Texas (126), New York (54).

Other English-Origin Names Like Caius

If you like Caius's English origin, consider these related names: Aaric, Aarika, Aarshiya, Aase, Aasiya. Browse all English names →

5-Letter Names Starting with C

Names with Caius's exact length and starting letter: Cabal, Cable, Cacey, Cacia, Cadan.

Quick Facts About Caius

5,642

English baby names in our dictionary

3,391

English male names

212

5-letter C-names in our dictionary

791

C-male names total

2025–2025

years of US SSA records (1 total)

254

total US births named Caius (all years)

US Popularity History (2025–2025)

Annual US births named Caius by gender, from US Social Security Administration records. Peak year: 2025 with 254 boys named Caius (boy rank #927 that year).

Source: US Social Security Administration. Limitations: US birth-certificate data only; names appearing fewer than 5 times in a given year are suppressed for privacy; spelling variants are counted separately. For names that ranked outside the US top 100 before year 2000, only the years they reached the top 100 are shown — the chart may have gaps for less-popular historical names.

Where in the US Is Caius Most Popular?

Average boy-name rank within each state across 2016–2025 SSA records. A lower number means the name appears closer to the top of that state's boys-name rankings — a per-capita measure that isn't biased toward large states. For Caius the strongest states are Oklahoma, Minnesota, Massachusetts.

Strongest boys-name states

#	State	Avg rank	Births
1	Oklahoma	#703	15
2	Minnesota	#714	25
3	Massachusetts	#725	16
4	Indiana	#726	39
5	Maryland	#742	18
6	Colorado	#779	21
7	North Carolina	#810	30
8	Pennsylvania	#834	27
9	Arizona	#838	24
10	Washington	#840	26

Weakest boys-name states

#	State	Avg rank	Births
1	Virginia	#958	18
2	Ohio	#887	36
3	Tennessee	#846	22
4	Washington	#840	26
5	Arizona	#838	24
6	Pennsylvania	#834	27
7	North Carolina	#810	30
8	Colorado	#779	21
9	Maryland	#742	18
10	Indiana	#726	39

Source: SSA state-level baby-name dataset 2016–2025. States with fewer than 3 years of data for Caius in this window are excluded. Births < 5 in a given state-year are suppressed by SSA for privacy.

Variant Forms

Name	Meaning	Gender	Origin
Cai	Female	Female	Vietnamese
Kay	Elder Sister (Hopi)	Female	Native American
Kaye	Variants Of Kay Keeper Of The Keys: Pure	Female	English

Looking for names like Caius?

A dedicated page with 60+ related names — spelling variants, rhymes, alliterations, same-origin matches, and shared meaning concepts — lives at its own URL so each kind of similarity gets a deeper treatment than fits here.

See all names like Caius →

Compare Caius to Other Popular Names

Side-by-side popularity charts and crossover years for Caius against today's most popular boys-name peers (top 8 by US births in the last 10 years of SSA records).

Caius vs Liam 239,320 births since 2014

Caius vs Noah 230,181 births since 2014

Caius vs Oliver 164,076 births since 2014

Caius vs William 159,918 births since 2014

Caius vs James 157,850 births since 2014

Caius vs Elijah 153,351 births since 2014

Caius vs Benjamin 147,449 births since 2014

Caius vs Lucas 141,302 births since 2014

Compare to a different name →