Mia vs Rex

Baby Name Comparison — 2026

Popularity Comparison

Mia Rank #5
Rex Rank #793

Mia is more popular, ranked #5 vs #793 for Rex.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Mia ___

  • Mia Rose
  • Mia Grace
  • Mia Jane
  • Mia Claire
  • Mia Elizabeth
  • Mia Louise

Rex ___

  • Rex James
  • Rex Oliver
  • Rex Arthur
  • Rex Henry
  • Rex William
  • Rex Theodore

Sibling Name Ideas

Names that pair well as siblings.

If you choose Mia

Liam Noah Sophia Olivia Ava

If you choose Rex

Max Leo Augustus Vivienne Cordelia

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 Mia or Rex more popular?

Mia is more popular, ranked #5 compared to Rex at #793 in the United States.

What do Mia and Rex mean?

Mia means "mine, beloved" (Scandinavian origin). Rex means "king" (Latin origin).

Are Mia and Rex boy or girl names?

Mia is primarily a girl name. Rex is primarily a boy name.

More Comparisons

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← Full profile: Mia ← Full profile: Rex Browse all baby names