Cassidie as a Baby Name. Meaning and Origin of Cassidie

What is the meaning of the name Cassidie ?

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

Cassidie is Irish in Origin.

Cassidie is a modern respelling of Cassidy, an Irish surname turned given name. It comes from the Gaelic Ó Caiside, "descendant of Caiside," with Caiside usually interpreted as "curly(-haired)." In medieval Ulster the O'Cassidys were prominent, hereditary physicians and poets, especially in Fermanagh under the Maguires, earning frequent mention in the Annals of Ireland. As a given name, Cassidy crossed into English-speaking usage in the late 20th century, used for both sexes but most popular for girls in the United States from the 1980s onward.

Pop-culture visibility, from Butch Cassidy to the Grateful Dead song "Cassidy," and entertainers like David and Shaun Cassidy, helped normalize the name. Cassidie keeps the sound while offering a softer, individualized look. Common variants include Cassidy, Kassidy, Cassidee, Cassadie, and Kassidi. Nicknames span Cass, Cassie, and Sid. The underlying sense evokes lively, curly hair and a friendly, approachable charm.