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Cassidy as a Baby Name. Meaning and Origin of Cassidy

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The baby name Cassidy is a Unisex name , 3 syllables long and is pronounced /ˈkæsɪdi/ (KAS-ih-dee).

Cassidy is Irish in Origin.

Gender: Unisex
Syllables: 3.0
Origin: Irish
Pronunciation: /ˈkæsɪdi/ (KAS-ih-dee)

What is the meaning of the name Cassidy ?

The baby name Cassidy is a Unisex name , 3 syllables long and is pronounced /ˈkæsɪdi/ (KAS-ih-dee).

Cassidy is Irish in Origin.

Cassidy is an Anglicized Irish surname turned given name, from O Caiside, meaning "descendant of Caiside." The personal name Caiside is linked to the Gaelic root cas, "curly, twisted," yielding the sense "curly-haired." The O'Cassidy family were noted medieval physicians and poets in Fermanagh, which helped the name circulate in Gaelic records before it migrated into English.

In the modern era Cassidy moved from surname use into a unisex given name in English-speaking countries, especially the United States and Canada, where it trends largely feminine since the late 20th century. Cultural visibility of the surname, from entertainers to the western folklore of "Butch Cassidy," aided its adoption. Variants include Cassady, Cassiday, Cassedy, and modern respellings Kassidy, Cassidi, Cassidee; the older Gaelic forms are O Caiside and Caiside. Common diminutives are Cass and Cassie, with occasional Sid/Siddy. The name's core meaning remains "curly-haired."

Cassidy has the following similar or variant Names

Famous people with the name Cassidy

Cassidy Freeman Actor · Born 1982 · United States Cassidy Freeman is an American actress and musician best known for playing Tess Mercer on Smallville. She’s also known for her roles as Cady Longmire in Longmire, Sage in The Vampire Diaries, and Amber Gemstone in The Righteous Gemstones. Cassidy Actor · Born 1982 · United States Cassidy is a given name and surname that may refer to various people, fictional characters, and places.

Cassidy – Popularity by country

Based on birth registration data from national statistics agencies.

Country Gender Year Rank Born of
Ireland Girls 2025 #1 874
CM 0 #56 1 2,592
MV Boys 0 #79 1 3,375
CN 0 #86 1 3,857
JM 0 #93 1 3,714
BN Boys 0 #138 2 6,332
JO 0 #140 1 2,158
MT Girls 0 #145 9 3,773
BW Girls 0 #151 1 4,216
CR 0 #164 2 5,526
PR Girls 0 #167 1 3,171
Sweden Girls 2012 #171 2 1,538
MT Boys 0 #179 1 4,064
AE 0 #186 2 10,220
Sweden Boys 2010 #189 2 1,344
MO Boys 0 #232 3 5,842
NA Girls 0 #237 1 7,146
Canada Girls 2024 #247 39 2,795
GH 0 #247 2 5,396
AO Boys 0 #249 1 5,568
NA Boys 0 #250 4 6,830
MO Girls 0 #263 1 7,056
NG 0 #271 2 5,926
JM Girls 0 #275 4 7,507
SG 0 #277 6 11,010
TW Girls 0 #287 3 8,139
KZ Boys 0 #296 1 6,578
Canada Boys 2023 #300 10 2,601
CZ Boys 0 #305 1 6,530
SA 0 #312 1 10,560
CN Boys 0 #331 1 9,639
GH Boys 0 #333 13 8,138
GT 0 #338 1 5,948
QA Girls 0 #342 2 15,378
MY 0 #349 6 12,352
CN Girls 0 #354 6 8,829
HK 0 #357 1 8,483
MU Girls 0 #357 6 8,539
SD Girls 0 #358 1 7,678
France Girls 2021 #366 40 3,185
PH Girls 0 #380 11 13,098
PT Boys 0 #381 1 7,951
France Boys 2018 #387 3 2,908
United States Girls 2024 #399 646 8,487
SD Boys 0 #419 27 10,523
OM Girls 0 #424 1 15,987
ZA 0 #432 16 14,421
CL 0 #434 1 6,867
MX 0 #445 1 8,339
PT Girls 0 #471 1 7,952
AR Boys 0 #483 1 7,628
GT Boys 0 #499 1 7,625
CR Girls 0 #509 24 11,342
CR Boys 0 #510 1 10,188
PA Girls 0 #515 4 9,861
HK Boys 0 #517 11 12,905
RU Girls 0 #520 4 11,913
UY Girls 0 #536 1 6,731
GT Girls 0 #541 1 7,500
CM Girls 0 #557 4 11,671
LY 0 #558 2 12,703
KW Girls 0 #561 1 19,177
PS Boys 0 #561 1 10,655
IR Boys 0 #564 2 10,162
CM Boys 0 #570 6 12,054
SG Girls 0 #577 10 18,916
BH 0 #587 1 17,937
AE Girls 0 #595 3 20,968
HK Girls 0 #596 20 16,104
BO Boys 0 #622 1 9,244
AR Girls 0 #630 1 8,289
BO Girls 0 #650 2 9,488
SG Boys 0 #672 26 17,960
NG Girls 0 #768 19 15,093
BR Boys 0 #784 2 12,213
Germany Girls 0 #828 11 4,949
United States Boys 2024 #832 61 7,044
ZA Girls 0 #841 307 25,928
TN 0 #865 1 13,765
NG Boys 0 #869 83 16,906
CL Girls 0 #911 5 14,098
NL Girls 0 #914 42 5,933
OM Boys 0 #918 1 17,948
EG Boys 0 #925 1 15,035
PE Boys 0 #925 2 14,506
CO Boys 0 #981 1 15,656
MY Girls 0 #985 10 24,821
BR Girls 0 #992 1 12,708
MY Boys 0 #996 116 25,439
EG Girls 0 #1,006 4 14,742
PE Girls 0 #1,008 3 14,861
SA Girls 0 #1,008 7 25,931
MX Boys 0 #1,033 1 16,355
IN Boys 0 #1,039 1 16,750
ZA Boys 0 #1,079 100 25,619
MA 0 #1,198 2 20,986
DZ 0 #1,234 1 20,130
MX Girls 0 #1,264 4 17,781
IT Girls 0 #1,432 15 9,415
SA Boys 0 #1,683 9 28,008

Cassidy is popular in 58 countries — most recent births per country:

Canada
France
United States
Scotland, United Kingdom
Ireland

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People also ask about Cassidy

Cassidy is a unisex name, given to both boys and girls.
Cassidy is a 3 syllable name, pronounced /ˈkæsɪdi/ (KAS-ih-dee).
Common nicknames and spelling variations include Kassidy, Kassidee, Cassidie, Cassady, Casidy and Kassady.
Across languages, Cassidy has these equivalents: Ó Caiside / Caiside (original Gaelic), Cassie (diminutive), Cady (diminutive), Cassandra (related nickname 'Cass').
Yes, very popular — Cassidy ranked #1 in Ireland in 2025, and appears in official birth registries across 7 countries.
Cassidy ranks highest in Ireland (#1 in 2025).
Yes — 2 notable people named Cassidy are in our database, including Cassidy Freeman (Actor), Cassidy (Actor).