Miller vs Rio

Baby Name Comparison — 2026

Miller

Boy #439 Most Popular 2 Syllables

Meaning

"one who mills grain"

Origin: Old English (mylenweard)

Cultural Roots

English American German

Quick Stats

Popularity Rank
#439
Total SSA Count
721
Syllables
2
Formality
Moderate
Nicknames
Mill

Playground Safety Score

✓ All Clear
Full profile for Miller →

Rio

Boy #517 Most Popular 2 Syllables

Meaning

"river"

Origin: Spanish/Portuguese

Cultural Roots

Spanish Portuguese Brazilian American

Quick Stats

Popularity Rank
#517
Total SSA Count
591
Syllables
2
Formality
Casual

Playground Safety Score

✓ All Clear
Full profile for Rio →

Popularity Comparison

Miller Rank #439
Rio Rank #517

Miller is more popular, ranked #439 vs #517 for Rio.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Miller ___

  • Miller James
  • Miller Reid
  • Miller Cole
  • Miller Grant
  • Miller Knox
  • Miller Hayes

Rio ___

  • Rio James
  • Rio Alexander
  • Rio Sebastian
  • Rio Marcus
  • Rio Cruz
  • Rio Blue

Sibling Name Ideas

Names that pair well as siblings.

If you choose Miller

Fletcher Cooper Brooks Piper Harper

If you choose Rio

Finn Kai Luna Isla Milo

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 Miller or Rio more popular?

Miller is more popular, ranked #439 compared to Rio at #517 in the United States.

What do Miller and Rio mean?

Miller means "one who mills grain" (Old English (mylenweard) origin). Rio means "river" (Spanish/Portuguese origin).

Are Miller and Rio boy or girl names?

Miller is primarily a boy name. Rio is primarily a boy name.

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← Full profile: Miller ← Full profile: Rio Browse all baby names