Fia vs Sullivan

Baby Name Comparison — 2026

Fia

Girl #2,090 Most Popular 2 Syllables

Meaning

"flame, light"

Origin: Italian

Cultural Roots

Italian Scottish Irish Scandinavian

Quick Stats

Popularity Rank
#2,090
Total SSA Count
92
Syllables
2
Formality
Casual

Playground Safety Score

✓ All Clear
Full profile for Fia →

Sullivan

Boy #340 Most Popular 3 Syllables

Meaning

"descendant of the dark one"

Origin: Irish Gaelic

Cultural Roots

Irish American English

Quick Stats

Popularity Rank
#340
Total SSA Count
1,011
Syllables
3
Formality
Moderate
Nicknames
Sully, Van

Playground Safety Score

✓ All Clear
Full profile for Sullivan →

Popularity Comparison

Fia Rank #2,090
Sullivan Rank #340

Sullivan is more popular, ranked #340 vs #2090 for Fia.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Fia ___

  • Fia Rose
  • Fia Lux
  • Fia Belle
  • Fia Grace
  • Fia Jade
  • Fia Lune

Sullivan ___

  • Sullivan James
  • Sullivan Patrick
  • Sullivan Thomas
  • Sullivan Reid
  • Sullivan Finn
  • Sullivan Grant

Sibling Name Ideas

Names that pair well as siblings.

If you choose Fia

Mia Isla Zoe Luca Nico

If you choose Sullivan

Finnegan Declan Bridget Nora Callum

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 Fia or Sullivan more popular?

Sullivan is more popular, ranked #340 compared to Fia at #2090 in the United States.

What do Fia and Sullivan mean?

Fia means "flame, light" (Italian origin). Sullivan means "descendant of the dark one" (Irish Gaelic origin).

Are Fia and Sullivan boy or girl names?

Fia is primarily a girl name. Sullivan is primarily a boy name.

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← Full profile: Fia ← Full profile: Sullivan Browse all baby names