Frederick vs Kieran

Baby Name Comparison — 2026

Frederick

Boy #424 Most Popular 3 Syllables

Meaning

"peaceful ruler"

Origin: Germanic

Cultural Roots

English German Scandinavian French American

Quick Stats

Popularity Rank
#424
Total SSA Count
741
Syllables
3
Formality
Formal
Nicknames
Fred, Freddy, Rick

Playground Safety Score

8 High Risk

{:type=>:rhyme_pattern, :severity=>:low, :message=>"'Frederick' ending sounds like 'sick/thick/dick'"}

Full profile for Frederick →

Kieran

Boy #441 Most Popular 2 Syllables

Meaning

"little dark one"

Origin: Irish Gaelic (ciar + -án)

Cultural Roots

Irish Scottish English

Quick Stats

Popularity Rank
#441
Total SSA Count
713
Syllables
2
Formality
Moderate
Nicknames
Kier

Playground Safety Score

✓ All Clear
Full profile for Kieran →

Popularity Comparison

Frederick Rank #424
Kieran Rank #441

Frederick is more popular, ranked #424 vs #441 for Kieran.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Frederick ___

  • Frederick James
  • Frederick William
  • Frederick Charles
  • Frederick John
  • Frederick Henry
  • Frederick Louis

Kieran ___

  • Kieran James
  • Kieran Patrick
  • Kieran Michael
  • Kieran Thomas
  • Kieran Francis
  • Kieran Joseph

Sibling Name Ideas

Names that pair well as siblings.

If you choose Frederick

Eleanor Charlotte George Arthur Margaret

If you choose Kieran

Declan Ronan Siobhan Niamh Cormac

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 Frederick or Kieran more popular?

Frederick is more popular, ranked #424 compared to Kieran at #441 in the United States.

What do Frederick and Kieran mean?

Frederick means "peaceful ruler" (Germanic origin). Kieran means "little dark one" (Irish Gaelic (ciar + -án) origin).

Are Frederick and Kieran boy or girl names?

Frederick is primarily a boy name. Kieran is primarily a boy name.

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← Full profile: Frederick ← Full profile: Kieran Browse all baby names