Sienna vs Theodore

Baby Name Comparison — 2026

Sienna

Girl #139 Most Popular 3 Syllables

Meaning

"reddish-brown earth pigment"

Origin: Italian

Cultural Roots

English Italian Australian

Quick Stats

Popularity Rank
#139
Total SSA Count
2,113
Syllables
3
Formality
Moderate
Nicknames
Si, Sisi, Enna

Playground Safety Score

✓ All Clear
Full profile for Sienna →

Popularity Comparison

Sienna Rank #139
Theodore Rank #4

Theodore is more popular, ranked #4 vs #139 for Sienna.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Sienna ___

  • Sienna Rose
  • Sienna Grace
  • Sienna Mae
  • Sienna Pearl
  • Sienna Faith
  • Sienna Jane

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 Sienna

Stella Luna Leo Marco Aria

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 Sienna or Theodore more popular?

Theodore is more popular, ranked #4 compared to Sienna at #139 in the United States.

What do Sienna and Theodore mean?

Sienna means "reddish-brown earth pigment" (Italian origin). Theodore means "divine gift" (Greek origin).

Are Sienna and Theodore boy or girl names?

Sienna is primarily a girl name. Theodore is primarily a boy name.

More Comparisons

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