Cassius vs Theodore

Baby Name Comparison — 2026

Popularity Comparison

Cassius Rank #568
Theodore Rank #4

Theodore is more popular, ranked #4 vs #568 for Cassius.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Cassius ___

  • Cassius James
  • Cassius Marcus
  • Cassius Cole
  • Cassius Reid
  • Cassius Blake
  • Cassius Grant

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 Cassius

Octavia Maximus Leonora Atticus Valentina

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 Cassius or Theodore more popular?

Theodore is more popular, ranked #4 compared to Cassius at #568 in the United States.

What do Cassius and Theodore mean?

Cassius means "hollow, empty" (Latin origin). Theodore means "divine gift" (Greek origin).

Are Cassius and Theodore boy or girl names?

Cassius is primarily a boy name. Theodore is primarily a boy name.

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