Cillian vs Oliver

Baby Name Comparison — 2026

Popularity Comparison

Cillian Rank #464
Oliver Rank #3

Oliver is more popular, ranked #3 vs #464 for Cillian.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Cillian ___

  • Cillian James
  • Cillian Patrick
  • Cillian Michael
  • Cillian Finn
  • Cillian Declan
  • Cillian Joseph

Oliver ___

  • Oliver James
  • Oliver Thomas
  • Oliver William
  • Oliver Henry
  • Oliver John
  • Oliver Benjamin

Sibling Name Ideas

Names that pair well as siblings.

If you choose Cillian

Declan Finn Conor Siobhan Saoirse

If you choose Oliver

Olivia Charlotte Emma Sophia Amelia

Which Name Fits Your Family?

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1. Which style feels more like your family?

Frequently Asked Questions

Is Cillian or Oliver more popular?

Oliver is more popular, ranked #3 compared to Cillian at #464 in the United States.

What do Cillian and Oliver mean?

Cillian means "strife, war" (Old Irish origin). Oliver means "olive tree" (Latin origin).

Are Cillian and Oliver boy or girl names?

Cillian is primarily a boy name. Oliver is primarily a boy name.

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← Full profile: Cillian ← Full profile: Oliver Browse all baby names