Cillian
Cillian sits comfortably in the UK charts at #217 in 2025 — recognisable but not overwhelming. Your child may occasionally share their name.
About the Name Cillian
Cillian is currently at its most popular point on record, sitting at UK #177. The name has climbed 61 places in the last five years — a significant surge by any measure. The name has been a consistent presence in UK records since 1996.
Cillian is fairly common in the UK, so your child is very likely to be the only Cillian in their class.
In the US it sits at #463 — notably more popular in the UK than across the Atlantic.
Frequently Asked Questions
Common questions about the name Cillian
🏫 Who else is in the room?
In a typical UK class of 28, highlighted children share the name Cillian
Almost certainly the only Cillian in the class
UK Popularity (1996–2025)
Rank and birth count · ONS official data
US Popularity (2020–2025)
Rank · SSA official data
✨ Similar names to Cillian
Names with a similar style — each with their own classroom story
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