Olivia vs Thalassa

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

Ella Georgia Arya Catalina

Full profile for Olivia →

Thalassa

Girl #34,004 Most Popular

Quick Stats

Popularity Rank: #34,004
Total SSA Count: 6
Nicknames: Tha, Thal, Thaly

Playground Safety Score

✓ All Clear

Similar Names

Lataska Trimika Asisha Lynika

Full profile for Thalassa →

Popularity Comparison

Olivia Rank #1

Thalassa Rank #34,004

Olivia is more popular, ranked #1 vs #34004 for Thalassa.

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

Thalassa ___

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 Thalassa

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 Thalassa more popular?

Olivia is more popular, ranked #1 compared to Thalassa at #34004 in the United States.

What do Olivia and Thalassa mean?

Olivia means "olive tree" (Latin origin).

Are Olivia and Thalassa boy or girl names?

Olivia is primarily a girl name. Thalassa is primarily a girl name.

More Comparisons

Thalassa vs Olivia Olivia vs Ella Olivia vs Georgia Olivia vs Arya Olivia vs Catalina

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