Olivia vs Sidni

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

Isabel Juliette Sophia Emily

Full profile for Olivia →

Sidni

Girl #65,353 Most Popular

Quick Stats

Popularity Rank: #65,353
Total SSA Count: 5
Nicknames: Sid, Siy, Siie

Playground Safety Score

✓ All Clear

Similar Names

Laida Doren Delice Corrin

Full profile for Sidni →

Popularity Comparison

Olivia Rank #1

Sidni Rank #65,353

Olivia is more popular, ranked #1 vs #65353 for Sidni.

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

Sidni ___

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 Sidni

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 Sidni more popular?

Olivia is more popular, ranked #1 compared to Sidni at #65353 in the United States.

What do Olivia and Sidni mean?

Olivia means "olive tree" (Latin origin).

Are Olivia and Sidni boy or girl names?

Olivia is primarily a girl name. Sidni is primarily a girl name.

More Comparisons

Sidni vs Olivia Olivia vs Isabel Olivia vs Juliette Olivia vs Sophia Olivia vs Emily

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