Caius

What Caius means

Meaning not yet sourced. Wiktionary has no word-by-word meaning for Caius yet, and we don’t write our own.

Editor’s note First shows up in US records in 1994, with 5 babies Worked out from the official US and England & Wales counts, not a meaning.

How popular is Caius?

US: Rising: up from #1287 in 2015. England & Wales: Rising: up from #1327 in 2015.

Biggest US share so far: 2025, when 254 boys got the name (#927 that year). First in the US records in 1994.

How common

• About 1 in 6,725 baby boys in the US in 2025
• About 1 in 8,772 baby boys in England and Wales in 2025

“1 in N” divides by all listed births for that sex. The US list leaves out names given to fewer than 5 babies, and the UK lists leave out names given to 2 or fewer, so the real figure is a little rarer than shown.

Where in the US

Most popular in MD (0.35 per 1,000 boys), MN (0.33 per 1,000 boys), IN (0.32 per 1,000 boys) in 2025.

SSA state data, 2025. Share of all listed boys born in each state.

US vs UK

Caius is #927 in the US and #976 in England & Wales (2025).

Same sex as this page (boys). SSA (US), ONS (England and Wales), NRS (Scotland).

Boy or girl?

In 2025, 99.9+% of US babies named Caius were boys.

Counts below the publishing threshold (US 5, UK 3) are not included.

How to say it

IPA from Wiktionary.

Other spellings parents chose in 2025

• Kaius216 US · 24 E&W
• Gaius31 US · 6 E&W

Names that sound the same and differ by a letter or two, with baby counts for the same sex. US and E&W counts.

If you like Caius

Boys

• Sebastian#16“august, venerable, exalted”^*
• Emiliano#94Editor’s note More popular in the US than England & Wales: #94 vs #1,359 in 2025
• Axel#79Editor’s note Up from #123 in 2015 to #79 in 2025 in the US. About 1 in 410 US boys in the 2025 records
• Ronan#247Irish, meaning “little seal”^*
• Julian#25“Roman personal name”^*
• Leonardo#91Italian, from Old French Leonard, meaning “as strong as a lion”^*

For a sister

• Elaina#267Editor’s note More popular in the US than England & Wales: #267 vs #951 in 2025
• Emersyn#138Editor’s note More popular in the US than England & Wales: #138 vs #3,705 in 2025
• Gia#287Editor’s note Up from #372 in 2015 to #287 in 2025 in the US
• Ximena#183Basque, meaning “son”^*
• Poppy#292Editor’s note More popular in England & Wales than the US: #7 vs #292 in 2025
• Kaia#193Editor’s note Climbing fast in the US: #447 in 2015, #193 in 2025

Picked from the US top 1,000 in 2025: names Wiktionary also files under where there are enough, topped up with common names whose US popularity since 1990 rose and fell most like Caius’s. Place names are only included if they are in the top 300. Rank is US 2025.