Dennis vs Rex

Baby Name Comparison — 2026

Dennis

Boy #708 Most Popular 2 Syllables

Meaning

"follower of Dionysus"

Origin: Greek

Cultural Roots

English French German Irish

Quick Stats

Popularity Rank
#708
Total SSA Count
376
Syllables
2
Formality
Moderate
Nicknames
Denny, Den

Playground Safety Score

✓ All Clear
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Popularity Comparison

Dennis Rank #708
Rex Rank #793

Dennis is more popular, ranked #708 vs #793 for Rex.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Dennis ___

  • Dennis James
  • Dennis Michael
  • Dennis Paul
  • Dennis Lee
  • Dennis Ray
  • Dennis Alan

Rex ___

  • Rex James
  • Rex Oliver
  • Rex Arthur
  • Rex Henry
  • Rex William
  • Rex Theodore

Sibling Name Ideas

Names that pair well as siblings.

If you choose Dennis

Kevin Patrick Karen Sharon Gary

If you choose Rex

Max Leo Augustus Vivienne Cordelia

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 Dennis or Rex more popular?

Dennis is more popular, ranked #708 compared to Rex at #793 in the United States.

What do Dennis and Rex mean?

Dennis means "follower of Dionysus" (Greek origin). Rex means "king" (Latin origin).

Are Dennis and Rex boy or girl names?

Dennis is primarily a boy name. Rex is primarily a boy name.

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