Castro vs Declin

Baby Name Comparison — 2026

Castro

Boy #17,549 Most Popular 2 Syllables

Meaning

"castle, fortress"

Origin: Latin

Cultural Roots

Spanish Portuguese Latin American

Quick Stats

Popularity Rank
#17,549
Total SSA Count
6
Syllables
2
Formality
Moderate
Nicknames
Cas, Caz

Playground Safety Score

✓ All Clear
Full profile for Castro →

Popularity Comparison

Castro Rank #17,549
Declin Rank #17,643

Castro is more popular, ranked #17549 vs #17643 for Declin.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Castro ___

  • Castro Luis
  • Castro Miguel
  • Castro Antonio
  • Castro Rafael
  • Castro Emilio

Declin ___

No pairings available yet.

Sibling Name Ideas

Names that pair well as siblings.

If you choose Castro

Diego Mateo Isabella Valentina

If you choose Declin

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 Castro or Declin more popular?

Castro is more popular, ranked #17549 compared to Declin at #17643 in the United States.

What do Castro and Declin mean?

Castro means "castle, fortress" (Latin origin).

Are Castro and Declin boy or girl names?

Castro is primarily a boy name. Declin is primarily a boy name.

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← Full profile: Castro ← Full profile: Declin Browse all baby names