Kiaran vs Thaddaus

Baby Name Comparison — 2026

Kiaran

Boy #18,076 Most Popular 2 Syllables

Meaning

"little dark one"

Origin: Irish

Cultural Roots

Irish Scottish

Quick Stats

Popularity Rank
#18,076
Total SSA Count
6
Syllables
2
Formality
Moderate
Nicknames
Kian, Ki

Playground Safety Score

✓ All Clear
Full profile for Kiaran →

Popularity Comparison

Kiaran Rank #18,076
Thaddaus Rank #17,964

Thaddaus is more popular, ranked #17964 vs #18076 for Kiaran.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kiaran ___

  • Kiaran James
  • Kiaran Patrick
  • Kiaran Connor
  • Kiaran Finn
  • Kiaran Liam
  • Kiaran Sean

Thaddaus ___

No pairings available yet.

Sibling Name Ideas

Names that pair well as siblings.

If you choose Kiaran

Ronan Declan Aoife Siobhan Cormac

If you choose Thaddaus

No sibling data available yet.

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 Kiaran or Thaddaus more popular?

Thaddaus is more popular, ranked #17964 compared to Kiaran at #18076 in the United States.

What do Kiaran and Thaddaus mean?

Kiaran means "little dark one" (Irish origin).

Are Kiaran and Thaddaus boy or girl names?

Kiaran is primarily a boy name. Thaddaus is primarily a boy name.

More Comparisons

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← Full profile: Kiaran ← Full profile: Thaddaus Browse all baby names