Cailo vs Ioan

Baby Name Comparison — 2026

Cailo

Boy #15,816 Most Popular 2 Syllables

Meaning

"rejoice, happy"

Origin: Welsh / Latin Gaius

Cultural Roots

English Welsh Modern American

Quick Stats

Popularity Rank
#15,816
Total SSA Count
7
Syllables
2
Formality
Casual
Nicknames
Kai, Cai, Kay

Playground Safety Score

✓ All Clear
Full profile for Cailo →

Popularity Comparison

Cailo Rank #15,816
Ioan Rank #15,712

Ioan is more popular, ranked #15712 vs #15816 for Cailo.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Cailo ___

  • Cailo James
  • Cailo River
  • Cailo Fox
  • Cailo Reid
  • Cailo Jude
  • Cailo Finn

Ioan ___

No pairings available yet.

Sibling Name Ideas

Names that pair well as siblings.

If you choose Cailo

Zara Mila Nova Lyra Axel

If you choose Ioan

No sibling data available yet.

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 Cailo or Ioan more popular?

Ioan is more popular, ranked #15712 compared to Cailo at #15816 in the United States.

What do Cailo and Ioan mean?

Cailo means "rejoice, happy" (Welsh / Latin Gaius origin).

Are Cailo and Ioan boy or girl names?

Cailo is primarily a boy name. Ioan is primarily a boy name.

More Comparisons

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← Full profile: Cailo ← Full profile: Ioan Browse all baby names