Castle vs Fergus

Baby Name Comparison — 2026

Popularity Comparison

Castle Rank #4,304
Fergus Rank #4,453

Castle is more popular, ranked #4304 vs #4453 for Fergus.

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

Fergus ___

  • Fergus James
  • Fergus Patrick
  • Fergus William
  • Fergus Hugh
  • Fergus Alastair
  • Fergus Duncan

Sibling Name Ideas

Names that pair well as siblings.

If you choose Castle

Bridger Archer London Beacon Harbor

If you choose Fergus

Hamish Alasdair Fiona Isla 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 Castle or Fergus more popular?

Castle is more popular, ranked #4304 compared to Fergus at #4453 in the United States.

What do Castle and Fergus mean?

Castle means "fortified stronghold" (Latin/Norman French origin). Fergus means "man of vigor" (Old Irish origin).

Are Castle and Fergus boy or girl names?

Castle is primarily a boy name. Fergus is primarily a boy name.

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