Callahan vs Cillian

Baby Name Comparison — 2026

Popularity Comparison

Callahan Rank #364
Cillian Rank #464

Callahan is more popular, ranked #364 vs #464 for Cillian.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Callahan ___

  • Callahan James
  • Callahan Patrick
  • Callahan Thomas
  • Callahan Joseph
  • Callahan Sean
  • Callahan Michael

Cillian ___

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

Sibling Name Ideas

Names that pair well as siblings.

If you choose Callahan

Brennan Delaney Riordan Aoife Fiona

If you choose Cillian

Declan Finn Conor Siobhan Saoirse

Which Name Fits Your Family?

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1. Which style feels more like your family?

Frequently Asked Questions

Is Callahan or Cillian more popular?

Callahan is more popular, ranked #364 compared to Cillian at #464 in the United States.

What do Callahan and Cillian mean?

Callahan means "lover of churches" (Irish Gaelic origin). Cillian means "strife, war" (Old Irish origin).

Are Callahan and Cillian boy or girl names?

Callahan is primarily a boy name. Cillian is primarily a boy name.

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