Seamus vs Theodore

Baby Name Comparison — 2026

Seamus

Boy #1,444 Most Popular 2 Syllables

Meaning

"supplanter"

Origin: Hebrew via Irish

Cultural Roots

Irish Scottish Gaelic

Quick Stats

Popularity Rank
#1,444
Total SSA Count
125
Syllables
2
Formality
Moderate
Nicknames
Shay

Playground Safety Score

✓ All Clear
Full profile for Seamus →

Popularity Comparison

Seamus Rank #1,444
Theodore Rank #4

Theodore is more popular, ranked #4 vs #1444 for Seamus.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Seamus ___

  • Seamus Patrick
  • Seamus Brendan
  • Seamus Declan
  • Seamus Finn
  • Seamus Ronan
  • Seamus James

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 Seamus

Declan Ronan Niamh Siobhan Finn

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 Seamus or Theodore more popular?

Theodore is more popular, ranked #4 compared to Seamus at #1444 in the United States.

What do Seamus and Theodore mean?

Seamus means "supplanter" (Hebrew via Irish origin). Theodore means "divine gift" (Greek origin).

Are Seamus and Theodore boy or girl names?

Seamus is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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