Monroe vs Sidney

Baby Name Comparison — 2026

Monroe

Girl #571 Most Popular 2 Syllables

Meaning

"mouth of the River Roe"

Origin: Gaelic/Scottish

Cultural Roots

Scottish Irish American

Quick Stats

Popularity Rank
#571
Total SSA Count
529
Syllables
2
Formality
Moderate
Nicknames
Roe, Monnie

Playground Safety Score

✓ All Clear
Full profile for Monroe →

Sidney

Boy #1,374 Most Popular 2 Syllables

Meaning

"from Saint Denis"

Origin: Anglo-Norman French

Cultural Roots

English American Australian

Quick Stats

Popularity Rank
#1,374
Total SSA Count
137
Syllables
2
Formality
Moderate
Nicknames
Sid

Playground Safety Score

✓ All Clear
Full profile for Sidney →

Popularity Comparison

Monroe Rank #571
Sidney Rank #1,374

Monroe is more popular, ranked #571 vs #1374 for Sidney.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Monroe ___

  • Monroe Grace
  • Monroe Rose
  • Monroe Lee
  • Monroe Blair
  • Monroe June
  • Monroe Faye

Sidney ___

  • Sidney James
  • Sidney Charles
  • Sidney Arthur
  • Sidney George
  • Sidney Philip
  • Sidney Thomas

Sibling Name Ideas

Names that pair well as siblings.

If you choose Monroe

Lennox Presley Jagger Bowie Lennon

If you choose Sidney

Shelby Beverly Evelyn Reginald Stanley

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 Monroe or Sidney more popular?

Monroe is more popular, ranked #571 compared to Sidney at #1374 in the United States.

What do Monroe and Sidney mean?

Monroe means "mouth of the River Roe" (Gaelic/Scottish origin). Sidney means "from Saint Denis" (Anglo-Norman French origin).

Are Monroe and Sidney boy or girl names?

Monroe is primarily a girl name. Sidney is primarily a boy name.

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← Full profile: Monroe ← Full profile: Sidney Browse all baby names