Killiam vs Trillion

Baby Name Comparison — 2026

Killiam

Boy #5,792 Most Popular 3 Syllables

Meaning

"little churchman, associated with the church"

Origin: Old Irish ceall + diminutive

Cultural Roots

Irish American

Quick Stats

Popularity Rank
#5,792
Total SSA Count
16
Syllables
3
Formality
Moderate
Nicknames
Kill, Liam, Killy

Playground Safety Score

✓ All Clear
Full profile for Killiam →

Popularity Comparison

Killiam Rank #5,792
Trillion Rank #5,802

Killiam is more popular, ranked #5792 vs #5802 for Trillion.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Killiam ___

  • Killiam James
  • Killiam Patrick
  • Killiam Michael
  • Killiam Sean
  • Killiam Finn
  • Killiam Cole

Trillion ___

  • Trillion James
  • Trillion Michael
  • Trillion Lee
  • Trillion Kai
  • Trillion Alexander

Sibling Name Ideas

Names that pair well as siblings.

If you choose Killiam

Declan Finn Ronan Saoirse Niamh

If you choose Trillion

Billion Phoenix Sterling Legend Nova

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 Killiam or Trillion more popular?

Killiam is more popular, ranked #5792 compared to Trillion at #5802 in the United States.

What do Killiam and Trillion mean?

Killiam means "little churchman, associated with the church" (Old Irish ceall + diminutive origin). Trillion means "one million million (10^12)" (French/English origin).

Are Killiam and Trillion boy or girl names?

Killiam is primarily a boy name. Trillion is primarily a boy name.

More Comparisons

Trillion vs Killiam Killiam vs Emma Killiam vs Vinnie Killiam vs Willian Killiam vs Joelle
← Full profile: Killiam ← Full profile: Trillion Browse all baby names