# Castillo vs Costello

> English confusable word pair

## The two words

### Castillo
*name · frequency rank #24,108*
A habitational surname from Spanish, from Spanish castillo (“castle”).

### Costello
*name · IPA /kɑˈstɛloʊ/ · frequency rank #19,800*
A surname from Irish.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/castillo-vs-costello