Castle vs Nyx

Baby Name Comparison — 2026

Popularity Comparison

Castle Rank #4,304
Nyx Rank #2,712

Nyx is more popular, ranked #2712 vs #4304 for Castle.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Castle ___

  • Castle James
  • Castle Lee
  • Castle River
  • Castle Grey
  • Castle Reid
  • Castle Stone

Nyx ___

  • Nyx Aurora
  • Nyx Celeste
  • Nyx Luna
  • Nyx Soleil
  • Nyx Vivienne
  • Nyx Elara

Sibling Name Ideas

Names that pair well as siblings.

If you choose Castle

Bridger Archer London Beacon Harbor

If you choose Nyx

Zephyr Orion Lyra Calyx Selene

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 Castle or Nyx more popular?

Nyx is more popular, ranked #2712 compared to Castle at #4304 in the United States.

What do Castle and Nyx mean?

Castle means "fortified stronghold" (Latin/Norman French origin). Nyx means "night, darkness" (Greek origin).

Are Castle and Nyx boy or girl names?

Castle is primarily a boy name. Nyx is primarily a girl name.

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← Full profile: Castle ← Full profile: Nyx Browse all baby names