Casidy is a variant of Cassidy, an Irish surname derived from the Gaelic word "Ó Caiside," meaning "descendant of Caiside," a personal name possibly related to the word "cath," meaning "battle" or "victory." The name has evolved over time, initially used as a surname to denote a family's historical significance and bravery. Today, it is used as a given name. The name's importance lies in its rich cultural heritage and its ability to convey a sense of pride and identity.
