Oneill vs Theodore

Baby Name Comparison — 2026

Popularity Comparison

Oneill Rank #37,049
Theodore Rank #4

Theodore is more popular, ranked #4 vs #37049 for Oneill.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Oneill ___

No pairings available yet.

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 Oneill

No sibling data available yet.

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 Oneill or Theodore more popular?

Theodore is more popular, ranked #4 compared to Oneill at #37049 in the United States.

What do Oneill and Theodore mean?

Theodore means "divine gift" (Greek origin).

Are Oneill and Theodore boy or girl names?

Oneill is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

Theodore vs Oneill Oneill vs Carlee Oneill vs Kiersten Oneill vs Tymetrius Oneill vs Daygoro
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