Olivia vs Pei

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

Esther Celeste Claire Anastasia

Full profile for Olivia →

Pei

Girl #34,514 Most Popular

Quick Stats

Popularity Rank: #34,514
Total SSA Count: 6

Playground Safety Score

✓ All Clear

Similar Names

Akeisha Megumi Demetres Keshi

Full profile for Pei →

Popularity Comparison

Olivia Rank #1

Pei Rank #34,514

Olivia is more popular, ranked #1 vs #34514 for Pei.

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

Pei ___

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 Pei

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 Pei more popular?

Olivia is more popular, ranked #1 compared to Pei at #34514 in the United States.

What do Olivia and Pei mean?

Olivia means "olive tree" (Latin origin).

Are Olivia and Pei boy or girl names?

Olivia is primarily a girl name. Pei is primarily a girl name.

More Comparisons

Pei vs Olivia Olivia vs Esther Olivia vs Celeste Olivia vs Claire Olivia vs Anastasia

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