Masterpiece Generator Name Generator
How popular is the name Cai?
Births per year, rank history and how many Cais are alive today.
Cai (male) is an uncommon spelling of the boys' name Kai in England and Wales, ranked 687th in 2025 with 52 babies given the name. This spelling of the name peaked in 2006, when 192 babies were given the name, the 214th most popular that year. It has declined since 2006; the 2025 figure is roughly 27% of its peak. Numbers have been falling in recent years.
Across all spellings of the name, the Kai you are most likely to meet is around 19 years old. Half of all Kais born in England and Wales are between 11 and 23, and there are at least 33,000 of them alive today. If you walk into a room of 100 males, there's roughly a 10% chance that at least one of them will be called Kai.
How many babies are named Cai each year?
Includes all spellings: Cai, Kai, Kye. Figures before 1996 are estimates.
Where does the Cai spelling rank?
Where does the Kai spelling rank?
Where does the Kye spelling rank?
Where this data comes from
Figures from 1996 onwards are the Office for National Statistics' annual baby-name registrations for England and Wales, which record every name given to three or more babies in a year. Figures before 1996 are estimates: the ONS published only top-100 rankings at ten-year intervals back to 1904, so counts for those years are modelled from the rankings, calibrated against Douglas Galbi's long-run research into English name frequencies, and shown with an uncertainty band. Estimates of living bearers combine these birth figures with national life tables and ONS mid-year population estimates.
One limit worth naming: these figures count names as registered at birth. Anyone who changes their name later in life - including trans people, and anyone who adopts a different name by deed poll or simply by use - is not reflected here. Birth registrations record where a name began, not the name a person lives with.
Common questions
When was the name Cai most popular?
The most popular form of the name, Kai, peaked in 2006, when 1,658 babies in England and Wales were given the name. The Cai spelling itself peaked in 2006, with 192 babies.
How many people are called Cai?
At least 33,000 people named Cai in any spelling born in England and Wales are alive today.
How old is the typical Cai?
Most living Cais are between 11 and 23; the most common age is about 19.
Is Cai becoming more or less popular?
Declining: recent figures are a fraction of the 2006 peak.