Olivia vs Oonagh

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

Juliette Grace Alani Sara

Full profile for Olivia →

Oonagh

Girl #27,158 Most Popular

Quick Stats

Popularity Rank: #27,158
Total SSA Count: 6
Nicknames: Oon, Oona, Oonay

Playground Safety Score

✓ All Clear

Similar Names

Sindel Fayte Madalie

Full profile for Oonagh →

Popularity Comparison

Olivia Rank #1

Oonagh Rank #27,158

Olivia is more popular, ranked #1 vs #27158 for Oonagh.

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

Oonagh ___

No pairings available yet.

Sibling Name Ideas

Names that pair well as siblings.

If you choose Olivia

Liam Noah Charlotte Emma Sophia

If you choose Oonagh

No sibling data available yet.

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 Oonagh more popular?

Olivia is more popular, ranked #1 compared to Oonagh at #27158 in the United States.

What do Olivia and Oonagh mean?

Olivia means "olive tree" (Latin origin).

Are Olivia and Oonagh boy or girl names?

Olivia is primarily a girl name. Oonagh is primarily a girl name.

More Comparisons

Oonagh vs Olivia Olivia vs Juliette Olivia vs Grace Olivia vs Alani Olivia vs Sara

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