Olivia vs Un

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

Lydia Caroline Avery Vivienne

Full profile for Olivia →

Un

Boy #14,975 Most Popular

Quick Stats

Popularity Rank: #14,975
Total SSA Count: 7

Playground Safety Score

✓ All Clear

Similar Names

Dasmine Eremy Tully Dam

Full profile for Un →

Popularity Comparison

Olivia Rank #1

Un Rank #14,975

Olivia is more popular, ranked #1 vs #14975 for Un.

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

Un ___

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 Un

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 Un more popular?

Olivia is more popular, ranked #1 compared to Un at #14975 in the United States.

What do Olivia and Un mean?

Olivia means "olive tree" (Latin origin).

Are Olivia and Un boy or girl names?

Olivia is primarily a girl name. Un is primarily a boy name.

More Comparisons

Un vs Olivia Olivia vs Lydia Olivia vs Caroline Olivia vs Avery Olivia vs Vivienne

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