Cassidy

/K-AE-S-IH-D-IY/

Girl ChristianAtheist English origin BritishAmerican

Clever one, curly-haired, from the Irish Gaelic Ó Caiside

See Cassidy scored for your family

Meaning & origin

Cassidy is a girl's name of English origin, traditionally used in Christian families. The name means "Clever one, curly-haired, from the Irish Gaelic Ó Caiside" and belongs to the Wisdom cluster — names meaning knowledge, insight, and thoughtful presence.

Beyond its Christian heritage, Cassidy is also used in Atheist traditions, reflecting how this name has traveled across cultures.

Common among British, American, European families, Cassidy carries cultural weight that goes beyond its dictionary definition — it's a name with a story and a community.

Numerology of Cassidy

Numerology assigns each name a single-digit destiny number by summing its letter values. Different schools use different mappings — NameRoot computes both so you can see how Cassidy resonates in either tradition.

Pythagorean
8
material mastery and executive power
Chaldean
7
introspection and spiritual wisdom

How Cassidy sounds

NameRoot scores the phonetic fit of every name against the sound of your last name. The pronunciation of Cassidy breaks down into 6 phonemes: /K-AE-S-IH-D-IY/. In the app, you'll see how those sounds flow with your family name across rhythm, stress, and consonant clusters.

Nicknames

Common affectionate forms of Cassidy — useful for everyday family conversation, early childhood, or as standalone given names themselves.

CasiCass

The six signals, applied to Cassidy

NameRoot scores every name across six independent dimensions. Here's how Cassidy maps to each — install the app to see the full compatibility score for your specific family.

01 — Birth Star
Nakshatra match
Enter your baby's birth date in the app and we'll compute the nakshatra compatibility score.
02 — Numerology
Destiny alignment
Pythagorean and Chaldean life-path calculations (destiny 8) matched against your family's own numerology profile.
03 — Phonetics
Last-name fit
Rhythm, stress, and consonant clusters measured with IPA to see how Cassidy flows with your family name.
04 — Meaning
Wisdom
Cassidy belongs to the Wisdom cluster — names meaning knowledge, insight, and thoughtful presence.
05 — Cultural & Tradition
Christian
As a Christian name, Cassidy carries religious and cultural weight scored against your family's heritage — plus grandparent-name matches, saint's-day alignment, and generational naming patterns scored against your family tree.
06 — Uniqueness
Popularity balance
How common Cassidy is today versus historically — finding the sweet spot between familiar and forgotten.

Names similar to Cassidy

If Cassidy resonates with you, these names live in the same world — drawn from the same tradition, sharing the same meaning, or echoing a similar sound.

From the same tradition

Other Christian girl names, common in British families

Olivia
The olive branch symbolises peace, wisdom, and enduring beauty.
Emma
Whole, universal, from Germanic ermen (whole, universal). Borne by 11th-century Queen Emma of Normandy
Amelia
Industrious, striving, the name that has topped English baby name charts for a decade — Amelia carries the Germanic root for work and effort, naming a child for the quality of determined application that turns talent into achievement. Amelia Earhart transformed it into a symbol of boundary-breaking adventure
Isla
Island, the serene landmass surrounded by water on every side — Isla takes its name from the Scottish island of Islay and carries the self-contained beauty of a place that is complete in itself, needing no bridge to the mainland to justify its existence

Sharing the same meaning

Other Christian girl names from the Wisdom cluster

Sophia
Wisdom, the highest form of knowledge that encompasses understanding, judgement, and moral insight — Sophia is both a name and a philosophical concept, the divine wisdom personified in Proverbs as a woman calling from the rooftops
Sofia
Wisdom, from Greek sophia, the word for insight, discernment, and deep understanding prized by philosophers. Honoured early as a Christian virtue and a martyr's name, it spread across the Latin and Orthodox worlds alike and remains a graceful favourite from Italy to Latin America.
Maya
Illusion, the enchanting veil that makes the world appear as solid when it is actually fluid — Maya is the great philosophical concept of Indian thought, the creative power that projects the universe like a dream upon the screen of consciousness. As a name it crosses Hindu, Buddhist, Greek, and Hebrew traditions, carrying layers of meaning: illusion, water, mother, and the intoxicating beauty of a world that may not be what it seems

Names that sound similar

Christian girl names that open with the same syllables as Cassidy

Carmen
Our Lady of Mount Carmel, a title of Mary carried as a household feminine name
Caroline
Free woman, strong, from Germanic karl (free man) via the Italian and French feminine. A name of queens
Callie
Beautiful, most beautiful, from Greek kallos (beauty). A warm Southern American diminutive of Caroline or Calliope

Common questions about Cassidy

What does the name Cassidy mean?

Cassidy means "Clever one, curly-haired, from the Irish Gaelic Ó Caiside." It is a girl name of English origin, traditionally used in Christian families.

Is Cassidy a boy or girl name?

Cassidy is most commonly used as a girl name.

What is the origin of the name Cassidy?

Cassidy is of English origin, used in Christian, Atheist traditions, commonly among British, American, European families.

What are common nicknames for Cassidy?

Common short forms of Cassidy include Casi, Cass.

What is the numerology of Cassidy?

Cassidy has a Pythagorean destiny number of 8 — material mastery and executive power.

See how Cassidy scores for your family

NameRoot is the only baby-name app that scores every name across 6 signals against your specific family context. Download free — Cassidy is waiting.

Get NameRoot — free