Olivia vs Theta

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

Millie Parker Iris Claire

Full profile for Olivia →

Theta

Girl #70,384 Most Popular

Quick Stats

Popularity Rank: #70,384
Total SSA Count: 5
Nicknames: The, Thy, Thie

Playground Safety Score

✓ All Clear

Similar Names

Flossy Jasaiah Alvis Arma

Full profile for Theta →

Popularity Comparison

Olivia Rank #1

Theta Rank #70,384

Olivia is more popular, ranked #1 vs #70384 for Theta.

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

Theta ___

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 Theta

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 Theta more popular?

Olivia is more popular, ranked #1 compared to Theta at #70384 in the United States.

What do Olivia and Theta mean?

Olivia means "olive tree" (Latin origin).

Are Olivia and Theta boy or girl names?

Olivia is primarily a girl name. Theta is primarily a girl name.

More Comparisons

Theta vs Olivia Olivia vs Millie Olivia vs Parker Olivia vs Iris Olivia vs Claire

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