"curly-haired"
Origin: Irish Gaelic
Language: Irish
Cassidy
Pronunciation: [ k-AS-ihd-ee ]
Does Cassidy flow with your last name?
A spirited Irish name with outlaw swagger
Irish
American
English
Classic
Vintage
Strong
Traditional
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Meaning & Origin
"descendant of Caiside"
Origin: Irish
Language: Irish
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The Story of Cassidy
Cassidy is an anglicized form of the Irish surname O Caiside, meaning descendant of Caiside. The personal name Caiside may derive from the Old Irish cas meaning curly-haired, making Cassidy a name that literally means curly-haired one. The O'Cassidy clan was prominent in County Fermanagh in Ulster. As a given name for boys, Cassidy has a natural association with the legendary outlaw Butch Cassidy.
Cassidy was used as a unisex name in the 1970s-80s, popularized partly by the song Cassidy by the Grateful Dead (1972). For boys, the Butch Cassidy connection maintains its appeal among parents who love western American history and outlaw mythology.
The legendary outlaw Butch Cassidy (Robert LeRoy Parker) made this name synonymous with American frontier mythology. The 1969 film Butch Cassidy and the Sundance Kid further cemented its cultural resonance.
Historical Record
Cassidy first appeared in US Social Security records in 1968.
Over 3,684 babies have been named Cassidy in the United States since SSA records began.
Today, Cassidy is past its peak , currently ranked #2,323 for boy names in the US .
Fun Facts
- Butch Cassidy (1866-1908) was a famous American outlaw and leader of the Wild Bunch gang
- The Grateful Dead song Cassidy (1972) is named after a baby born on a tour bus
Cassidy in Other Languages
Irish
O Caiside
English
Cassidy
Spanish
Casidy
Popularity Over Time
#2,323
Current Rank
Stable
Trend
Peaked 1984
Based on SSA data 1880–present
Year-by-year popularity data will be available soon.
Famous People Named Cassidy
D
David Cassidy
Musician
1950
American teen idol and actor famous for The Partridge Family
B
Butch Cassidy
Other
1866
Legendary American outlaw and leader of the Wild Bunch gang
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See all →Quick Facts
- Gender
- Boy
- Syllables
- 3
- Popularity Rank
- #2,323
- Total SSA Count
- 61
- Cultural Origins
- Irish American English
- Pronunciation
- Easy
- Formality
- Moderate
- Cross-Cultural Ease
- High
Alternative Spellings
Common Nicknames
Cass
Cas
Sid
Middle Name Ideas
Suggested pairings based on syllable flow and style
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Classic pairing, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Classic pairing, smooth 3-1 syllable flow
Middle Names
Middle Names for Cassidy
7 name pairings with syllable flow tips
Sibling Names
Sibling Match
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Also a Girl Name
Cassidy is also used as a girl name, ranked #476.
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Frequently Asked Questions About Cassidy
What does the name Cassidy mean?
"curly-haired" (from Irish Gaelic). "descendant of Caiside" (from Irish). Cassidy is an anglicized form of the Irish surname O Caiside, meaning descendant of Caiside. The personal name Caiside may derive from the Old Irish cas meaning curly-haired, making Cassidy a name that literally means curly-haired one. The O'Cassidy clan was prominent in County Fermanagh in Ulster. As a given name for boys, Cassidy has a natural association with the legendary outlaw Butch Cassidy.
What is the origin of the name Cassidy?
Cassidy has Irish Gaelic, Irish, American, and English origins. In Irish Gaelic, it means "curly-haired". In Irish, it means "descendant of Caiside".
Is Cassidy a boy or girl name?
Cassidy is used as both a boy and girl name. As a boy name, it is ranked #2323. As a girl name, it is ranked #476. Cassidy is more commonly used as a girl name.
How do you pronounce Cassidy?
Cassidy is pronounced k-AS-ihd-ee.
How popular is the name Cassidy?
Cassidy is currently ranked #2323 in popularity for boy names in the United States.
What are common nicknames for Cassidy?
Common nicknames for Cassidy include Cass, Cas, and Sid.
What are good middle names for Cassidy?
Popular middle name pairings include Cassidy James, Cassidy Ryan, Cassidy Patrick, Cassidy Thomas, Cassidy Lee, Cassidy Dean, and Cassidy Wayne.
What are good sibling names for Cassidy?
Names that pair well with Cassidy as siblings include Brady, Riley, Finley, Kennedy, Quinn, Rory, and Murphy.
How many syllables does Cassidy have?
Cassidy has 3 syllables, making it distinctive and rhythmic.
Is Cassidy a common or rare name?
Cassidy is an uncommon name, ranked #2323 in the US. Its rarity gives it a distinctive, memorable quality.
What boy names are similar to Cassidy?
About the Name Cassidy
Cassidy is a boy name with Irish, American, and English origins . The name means "curly-haired" in Irish Gaelic .
Is Cassidy a boy or girl name? Cassidy is used as both a boy and girl name. As a boy name, it ranks #2,323 in popularity. As a girl name, it ranks #476. Cassidy is more commonly used as a girl name.
Cassidy is currently ranked #2,323 in popularity for boy names in the United States.
The name Cassidy has 3 syllables and is pronounced k-AS-ihd-ee, making it distinctive and memorable.
Common nicknames for Cassidy include Cass, Cas, and Sid. These shorter forms provide casual alternatives while keeping the elegance of the full name.
Alternative spellings of Cassidy include Cassius, Cassian, Cassiel . Each spelling variation gives the name a slightly different character while preserving its sound and meaning.
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Sources
- U.S. Social Security Administration — National Baby Names Data (popularity rankings and historical trends)
- Behind the Name (etymology and meaning research)
- NamingEverything editorial research and analysis