Caius vs Theodore

Baby Name Comparison — 2026

Caius

Boy #1,063 Most Popular 2 Syllables

Meaning

"to rejoice, joyful"

Origin: Latin

Cultural Roots

Roman British European American

Quick Stats

Popularity Rank
#1,063
Total SSA Count
205
Syllables
2
Formality
Formal
Nicknames
Cai, Kai

Playground Safety Score

✓ All Clear
Full profile for Caius →

Popularity Comparison

Caius Rank #1,063
Theodore Rank #4

Theodore is more popular, ranked #4 vs #1063 for Caius.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Caius ___

  • Caius James
  • Caius John
  • Caius Edward
  • Caius William
  • Caius Alexander
  • Caius Thomas

Theodore ___

  • Theodore James
  • Theodore William
  • Theodore Alexander
  • Theodore John
  • Theodore Henry
  • Theodore Arthur

Sibling Name Ideas

Names that pair well as siblings.

If you choose Caius

Livia Augustus Felix Octavia Marcus

If you choose Theodore

Olivia Charlotte Amelia Eleanor Oliver

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 Caius or Theodore more popular?

Theodore is more popular, ranked #4 compared to Caius at #1063 in the United States.

What do Caius and Theodore mean?

Caius means "to rejoice, joyful" (Latin origin). Theodore means "divine gift" (Greek origin).

Are Caius and Theodore boy or girl names?

Caius is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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← Full profile: Caius ← Full profile: Theodore Browse all baby names