Cillian
A boys’ name of Irish origin, meaning bright-headed or gray-eyed.
Babies a year
230
England and Wales, 2025
Rarity
Uncommon
among names in use
US popularity
#507
down from #463
UK popularity
#217
230 babies · down from #177
How Cillian has moved
View as table
| Year | US rank |
|---|---|
| 2020 | #957 |
| 2021 | #747 |
| 2022 | #736 |
| 2023 | #593 |
| 2024 | #463 |
| 2025 | #507 |
Cillian by the numbers
In 2025, 230 babies in England and Wales were named Cillian. In the US, 168 were, though that figure is from 2017, the most recent full year we hold.
For the size of the two countries, it is given several times more often in England and Wales than in the US.
Its American peak was 176 babies in 2016, making it a 2010s name.
Spelled almost the same
Other names in the records within a letter or two of Cillian. Close spellings are not always related names, but they are usually worth seeing together.
Other names that mean light
Like Cillian, each of these has light in its meaning. Different names, different histories, the same idea.
- Lucasbringer of light; from Lucania12,963 in the US (2017)
- Lukefrom Lucania; light9,168 in the US (2017)
- Robertbright fame; renowned warrior5,507 in the US (2017)
- Lucabringer of light3,266 in England and Wales (2025)
- Elliottbright fame; a form of Elijah2,996 in the US (2017)
- Elliotbright fame; a form of Elijah544 in England and Wales (2025)
Names about as common as Cillian
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