Olivia vs Reilly

Baby Name Comparison — 2026

Olivia

Girl #1 Most Popular 4 Syllables

Meaning

"olive tree"

Origin: Latin

Cultural Roots

English Italian American

Quick Stats

Popularity Rank
#1
Total SSA Count
14,718
Syllables
4
Formality
Moderate
Nicknames
Liv, Livvy, Oli

Playground Safety Score

✓ All Clear

Similar Names

Mia Leah Alana
Full profile for Olivia →

Reilly

Girl #2,728 Most Popular 2 Syllables

Meaning

"courageous, valiant"

Origin: Irish Gaelic

Cultural Roots

Irish American Australian

Quick Stats

Popularity Rank
#2,728
Total SSA Count
63
Syllables
2
Formality
Casual
Nicknames
Rei, Reil

Playground Safety Score

✓ All Clear
Full profile for Reilly →

Popularity Comparison

Olivia Rank #1
Reilly Rank #2,728

Olivia is more popular, ranked #1 vs #2728 for Reilly.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Olivia ___

  • Olivia Rose
  • Olivia Grace
  • Olivia Jane
  • Olivia Mae
  • Olivia Claire
  • Olivia Jade

Reilly ___

  • Reilly Grace
  • Reilly Ann
  • Reilly Mae
  • Reilly Kate
  • Reilly Claire
  • Reilly Rose

Sibling Name Ideas

Names that pair well as siblings.

If you choose Olivia

Liam Noah Charlotte Emma Sophia

If you choose Reilly

Finn Caitlin Declan Sienna Aidan

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 Olivia or Reilly more popular?

Olivia is more popular, ranked #1 compared to Reilly at #2728 in the United States.

What do Olivia and Reilly mean?

Olivia means "olive tree" (Latin origin). Reilly means "courageous, valiant" (Irish Gaelic origin).

Are Olivia and Reilly boy or girl names?

Olivia is primarily a girl name. Reilly is primarily a girl name.

More Comparisons

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← Full profile: Olivia ← Full profile: Reilly Browse all baby names