Girl name · Irish
Cassidy
“curly-haired, clever”
Vibes
Explore Cassidy further
Similar-feel alternatives, or middle-name candidates that pair well with Cassidy — both ranked by the same scoring system (vibe overlap, syllable rhythm, origin compatibility).
About the name
Cassidy is Irish — Ó Caiside, "descendant of the curly-haired one" (with "clever" riding along in folk use) — a surname that Hopalong Cassidy westerns and a Grateful Dead ballad turned into a given name.
Cassidy peaked in the American top 100 in the late 1990s and holds steady use — a Y2K-era signature aging into its own vintage.
The name is a lasso thrown with a smile. Cass and Cassie both wear well. It pairs with classic middles (Cassidy Jane, Cassidy Rose). On our vibe map it is Y2K Nostalgic with Boho trail dust.
More Irish names
Cassidy sits in our Irish set — these share its roots.
All Irish names →Cassidy — common questions
Is Cassidy a boy or girl name?
Cassidy is traditionally a girl name of Irish origin. It ranked #541 among US girls' names in 2025.
What does the name Cassidy mean?
Cassidy means “curly-haired, clever” of Irish origin. Cassidy is Irish — Ó Caiside, "descendant of the curly-haired one" (with "clever" riding along in folk use) — a surname that Hopalong Cassidy westerns and a Grateful Dead ballad turned into a given name.
Where does the name Cassidy come from?
Cassidy is Irish in origin. Cassidy peaked in the American top 100 in the late 1990s and holds steady use — a Y2K-era signature aging into its own vintage.
How popular is Cassidy?
Cassidy ranked #541 in US Social Security Administration data for 2025, which keeps it recognisable but uncommon.
Bring the name into the room
A couple of nice things named Cassidy you might want for the nursery.