Cillian

Meaning of Cillian

The name Cillian means 'little church' or 'bright-headed'. It's a traditional Irish name with a gentle sound.

Cillian has Irish roots — browse every Irish baby name in our catalog.

Popularity of Cillian

Cillian has cooled off, slipping to #507 in 2025, down from a peak of #463 in 2024.

Notable people named Cillian

• Cillian Murphy
  Acclaimed Irish actor, Oppenheimer star
• Cillian O'Connor
  Irish rugby player, Leinster captain
• Cillian Byrne
  Irish hurler, Kilkenny legend
• Cillian Stokes
  Irish Gaelic footballer, Mayo star
• Cillian Walshe
  Irish actor, stage and screen

More Irish names

Questions about the name Cillian

What does the name Cillian mean?

Cillian means the name cillian means 'little church' or 'bright-headed'. it's a traditional irish name with a gentle sound, and it comes from Irish origins.

Is Cillian a boy's or a girl's name?

Cillian is most commonly used as a boy's name in the United States.

How popular is the name Cillian?

In 2025, Cillian ranked #507 for boys, down from #463 the year before.

When was Cillian most popular?

Cillian peaked at #463 in 2024.