Jaclyn vs Lou

Baby Name Comparison — 2026

Jaclyn

Girl #2,722 Most Popular 2 Syllables

Meaning

"supplanter, one who follows"

Origin: Hebrew

Cultural Roots

American English French

Quick Stats

Popularity Rank
#2,722
Total SSA Count
63
Syllables
2
Formality
Moderate
Nicknames
Jackie, Jac

Playground Safety Score

✓ All Clear
Full profile for Jaclyn →

Lou

Boy #2,123 Most Popular 1 Syllable

Meaning

"famous warrior"

Origin: Germanic via French Louis

Cultural Roots

French English American

Quick Stats

Popularity Rank
#2,123
Total SSA Count
70
Syllables
1
Formality
Casual

Playground Safety Score

24 High Risk

{:type=>:nickname, :severity=>:medium, :message=>"'Lou' can be twisted to 'poo'"}

Full profile for Lou →

Popularity Comparison

Jaclyn Rank #2,722
Lou Rank #2,123

Lou is more popular, ranked #2123 vs #2722 for Jaclyn.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Jaclyn ___

  • Jaclyn Marie
  • Jaclyn Rose
  • Jaclyn Ann
  • Jaclyn Nicole
  • Jaclyn Lynn
  • Jaclyn Claire

Lou ___

  • Lou Henry
  • Lou James
  • Lou William
  • Lou Allen
  • Lou Clark
  • Lou Reed

Sibling Name Ideas

Names that pair well as siblings.

If you choose Jaclyn

John Caroline Michael Elizabeth Patrick

If you choose Lou

Beau Nell Dot June Ray

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 Jaclyn or Lou more popular?

Lou is more popular, ranked #2123 compared to Jaclyn at #2722 in the United States.

What do Jaclyn and Lou mean?

Jaclyn means "supplanter, one who follows" (Hebrew origin). Lou means "famous warrior" (Germanic via French Louis origin).

Are Jaclyn and Lou boy or girl names?

Jaclyn is primarily a girl name. Lou is primarily a boy name.

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← Full profile: Jaclyn ← Full profile: Lou Browse all baby names