Cian vs Theodore

Baby Name Comparison — 2026

Cian

Boy #1,535 Most Popular 2 Syllables

Meaning

"ancient, enduring, long-lived"

Origin: Old Irish

Cultural Roots

Irish Celtic Irish diaspora

Quick Stats

Popularity Rank
#1,535
Total SSA Count
115
Syllables
2
Formality
Moderate
Nicknames
Ki, Ci

Playground Safety Score

15 High Risk

{:type=>:rhyme, :severity=>:medium, :message=>"'Cian' rhymes with 'mean'"}

Full profile for Cian →

Popularity Comparison

Cian Rank #1,535
Theodore Rank #4

Theodore is more popular, ranked #4 vs #1535 for Cian.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Cian ___

  • Cian Patrick
  • Cian Finn
  • Cian Declan
  • Cian Joseph
  • Cian Seamus
  • Cian Brendan

Theodore ___

  • Theodore James
  • Theodore William
  • Theodore Alexander
  • Theodore John
  • Theodore Henry
  • Theodore Arthur

Sibling Name Ideas

Names that pair well as siblings.

If you choose Cian

Roisin Aoife Niall Brendan Siobhan

If you choose Theodore

Olivia Charlotte Amelia Eleanor Oliver

Which Name Fits Your Family?

Answer 3 quick questions and we'll help you decide.

1. Which style feels more like your family?

Frequently Asked Questions

Is Cian or Theodore more popular?

Theodore is more popular, ranked #4 compared to Cian at #1535 in the United States.

What do Cian and Theodore mean?

Cian means "ancient, enduring, long-lived" (Old Irish origin). Theodore means "divine gift" (Greek origin).

Are Cian and Theodore boy or girl names?

Cian is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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← Full profile: Cian ← Full profile: Theodore Browse all baby names