Killua vs Theodore

Baby Name Comparison — 2026

Killua

Boy #5,636 Most Popular 3 Syllables

Meaning

"fictional invented name, no established meaning"

Origin: Japanese (fictional)

Cultural Roots

American Japanese

Quick Stats

Popularity Rank
#5,636
Total SSA Count
17
Syllables
3
Formality
Casual
Nicknames
Kil, Killy

Playground Safety Score

✓ All Clear
Full profile for Killua →

Popularity Comparison

Killua Rank #5,636
Theodore Rank #4

Theodore is more popular, ranked #4 vs #5636 for Killua.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Killua ___

  • Killua Zane
  • Killua Ray
  • Killua Cole
  • Killua James
  • Killua Lee
  • Killua Ash

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 Killua

Gon Kurapika Leorio Zeno Illumi

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 Killua or Theodore more popular?

Theodore is more popular, ranked #4 compared to Killua at #5636 in the United States.

What do Killua and Theodore mean?

Killua means "fictional invented name, no established meaning" (Japanese (fictional) origin). Theodore means "divine gift" (Greek origin).

Are Killua and Theodore boy or girl names?

Killua is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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