Caius is a distinctive choice, ranked #1132 in 2024. Your child is likely to be the only Caius in their class.
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UK Rank 2024
#1132
About the Name Caius
Caius has seen a notable decline in recent years, dropping 139 places in five years. It was most popular in 2023 at #890 — parents choosing it today are making a deliberately counter-trend decision. The name has been a consistent presence in UK records since 1996.
Caius is distinctive enough that your child will likely be the only one in both their class and their school — standing out on every register.
Frequently Asked Questions
Common questions about the name Caius
Unlikely. With around 25 UK babies named Caius per year, your child will almost certainly be the only Caius in his class, and possibly the only one in the whole school.
Caius has been declining in UK popularity, dropping 139 places in the last five years. Its peak was #890 in 2023. Choosing it now means he is likely to be among the last of his generation with this name.
Caius is a distinctive choice sitting outside the mainstream UK top names. Parents choosing less common names often find their children appreciate the individuality as they grow up, rarely needing to add an initial to distinguish themselves.
Notable people named Caius include: Caius Faatili — Caius Faatili is a New Zealand professional rugby league footballer who plays as a prop for Wakefield Trinity in the Super League.; Pope Caius — Pope Caius (died 22 April 296), also called Gaius, was the bishop of Rome from 17 December 283 to his death in 296.; Caius of Korea — Caius of Korea is the 128th of the 205 Catholic Martyrs of Japan beatified by Pope Pius IX on 7 July 1867, after he had canonized the Twenty-six Martyrs of....
Caius does not appear in the US top 1,000 baby names, making it a distinctively British choice — your child is unlikely to encounter American Caiuss in the wild.
25
UK babies named Caius (2024)
< 1
Expected classmates with this name (class of 28)
~0.0
In a school of 600
↓ 139 places
Rank change (last 5 years)
🏫 Who else is in the room?
In a typical UK class of 28, highlighted children share the name Caius
Likely around 1 other Caius in the class
UK Popularity (1996–2024)
Rank and birth count · ONS official data
No US data available for this name
✨ Similar names to Caius
Names with a similar style — each with their own classroom story
John Caius, also known as Johannes Caius and Ioannes Caius, was an English physician, and second founder of Gonville and Caius College, Cambridge. Scholar and physician to Edward VI and Mary I of England.
Pope Caius (died 22 April 296), also called Gaius, was the bishop of Rome from 17 December 283 to his death in 296. Little information on Caius is available except that given by the Liber Pontificalis, which relies on a legendary account of the martyrdom of Susanna of Rome for its information.
Caius, Presbyter of Rome (also known as Gaius) was a Christian author who lived and wrote towards the beginning of the 3rd century. Only fragments of his works are known, which are given in the collection entitled The Ante-Nicene Fathers.
Caius Adrian Lungu was a Romanian footballer who played as a right-back or right midfielder. The first match in the Liga I was played for Voința Sibiu against Astra Ploiești.
Caius of Korea is the 128th of the 205 Catholic Martyrs of Japan beatified by Pope Pius IX on 7 July 1867, after he had canonized the Twenty-six Martyrs of Japan five years before on 8 June 1862.