Crowley 1

Crowley is an Irish surname. It is an Anglicized form of the Irish Ó Cruadhlaoich, meaning "descendant of Cruadhlaoch". The personal name Cruadhlaoch is derived from the Gaelic elements cruadh "hardy" and laoch "hero", translating to "hardy hero". The surname originated in County Cork, Ireland, and is primarily associated with the Munster region.

Crowley is a classic example of a patronymic or clan surname common in Irish naming traditions. The presence of the Mac and Ó prefixes, with Crowley falling under Ó, indicates descent from a common male ancestor, in this case Cruadhlaoch. The spelling was altered upon Anglicization, a process that occurred throughout the 16th and 17th centuries, most notably after Tudor expansions into Ireland.

• Meaning: "Hardy hero"
• Origin: Irish (Fitzgerald descent)
• Type: Surname
• Usage: Ireland, with prominent diaspora in the United States and England