Masterpiece Generator Name Generator
How popular is the name Cillian?
Births per year, rank history and how many Cillians are alive today.
Cillian (male) sits just outside the top 100 boys' names in England and Wales, ranked 217th in 2025 with 230 babies given the name. The name peaked in 2024, when 285 babies were given the name, the 177th most popular that year. It has risen strongly over the past decade.
The Cillian you are most likely to meet is around 2 years old. Half of all Cillians born in England and Wales are between 3 and 10, and there are at least 2,600 of them alive today. If you walk into a room of 100 males, there's less than a 1% chance that anyone will be called Cillian - on average, only one in every 117 such rooms contains a Cillian.
How many babies are named Cillian each year?
Where does Cillian rank among boys' names?
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 Cillian most popular?
Cillian peaked in 2024, when 285 babies in England and Wales were given the name.
How many people are called Cillian?
At least 2,600 people named Cillian born in England and Wales are alive today.
How old is the typical Cillian?
Most living Cillians are between 3 and 10; the most common age is about 2.
Is Cillian becoming more or less popular?
Rising: it has climbed strongly over the past decade.