Cassidy

C3A1S1S1I1D2Y4
US/ˈkæsɪdi/US/ˈkæsədi/

proper noun

A surname from Irish anglicized from Ó Casaide (“descendant of Caiside”). Caiside is a byname from Irish cas (“curly”) meaning “curly-haired”.

Less commonScrabble 13

Meanings

proper noun

alternative Casady · alternative Cassda · alternative Casada · alternative Cassaday · alternative Cassady · alternative Cassedy · alternative Cassady · alternative Cassiday · alternative Kassidy

  1. A surname from Irish anglicized from Ó Casaide (“descendant of Caiside”). Caiside is a byname from Irish cas (“curly”) meaning “curly-haired”.
  2. A surname from Irish, a rare anglicization of Mac Casarlaigh (“son of Casarlach”) (Casserly).
  3. A male given name transferred from the surname.
  4. A female given name transferred from the surname, of modern American usage.

Origin

From the Irish surname, Anglicized from Ó Caiside (“descendant of Caiside”), from cas (“curly-haired”).

Full word history & related roots →
Cite this entry
APA

Cassidy. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/Cassidy

MLA

“Cassidy.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Cassidy. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “Cassidy,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/Cassidy.

Source: Cassidy on Wiktionary, CC BY-SA 4.0.