Kastor vs Oliver

Baby Name Comparison — 2026

Oliver

Boy #3 Most Popular 3 Syllables

Meaning

"olive tree"

Origin: Latin

Cultural Roots

English French Scandinavian

Quick Stats

Popularity Rank
#3
Total SSA Count
15,343
Syllables
3
Formality
Moderate
Nicknames
Ollie, Oli

Playground Safety Score

✓ All Clear
Full profile for Oliver →

Popularity Comparison

Kastor Rank #25,466
Oliver Rank #3

Oliver is more popular, ranked #3 vs #25466 for Kastor.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kastor ___

No pairings available yet.

Oliver ___

  • Oliver James
  • Oliver Thomas
  • Oliver William
  • Oliver Henry
  • Oliver John
  • Oliver Benjamin

Sibling Name Ideas

Names that pair well as siblings.

If you choose Kastor

No sibling data available yet.

If you choose Oliver

Olivia Charlotte Emma Sophia Amelia

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 Kastor or Oliver more popular?

Oliver is more popular, ranked #3 compared to Kastor at #25466 in the United States.

What do Kastor and Oliver mean?

Oliver means "olive tree" (Latin origin).

Are Kastor and Oliver boy or girl names?

Kastor is primarily a boy name. Oliver is primarily a boy name.

More Comparisons

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← Full profile: Kastor ← Full profile: Oliver Browse all baby names