Aileen vs Louisa

Baby Name Comparison — 2026

Aileen

Girl #718 Most Popular 2 Syllables

Meaning

"bright, shining light"

Origin: Irish/Greek Helene

Cultural Roots

Irish Scottish English American

Quick Stats

Popularity Rank
#718
Total SSA Count
390
Syllables
2
Formality
Moderate
Nicknames
Ally, Lee, Leenie

Playground Safety Score

15 High Risk

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

Full profile for Aileen →

Louisa

Girl #733 Most Popular 3 Syllables

Meaning

"famous warrior"

Origin: Old Frankish/Germanic

Cultural Roots

English German French Italian Spanish

Quick Stats

Popularity Rank
#733
Total SSA Count
383
Syllables
3
Formality
Formal
Nicknames
Lou, Louie, Lulu

Playground Safety Score

✓ All Clear
Full profile for Louisa →

Popularity Comparison

Aileen Rank #718
Louisa Rank #733

Aileen is more popular, ranked #718 vs #733 for Louisa.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Aileen ___

  • Aileen Rose
  • Aileen Marie
  • Aileen Grace
  • Aileen Patricia
  • Aileen Margaret
  • Aileen Frances

Louisa ___

  • Louisa May
  • Louisa Grace
  • Louisa Anne
  • Louisa Claire
  • Louisa Jane
  • Louisa Rose

Sibling Name Ideas

Names that pair well as siblings.

If you choose Aileen

Brigid Colleen Fiona Patrick Seamus

If you choose Louisa

Josephine Eleanor Frederick Arthur Harriet

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 Aileen or Louisa more popular?

Aileen is more popular, ranked #718 compared to Louisa at #733 in the United States.

What do Aileen and Louisa mean?

Aileen means "bright, shining light" (Irish/Greek Helene origin). Louisa means "famous warrior" (Old Frankish/Germanic origin).

Are Aileen and Louisa boy or girl names?

Aileen is primarily a girl name. Louisa is primarily a girl name.

More Comparisons

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← Full profile: Aileen ← Full profile: Louisa Browse all baby names