Cassidie is a variant of the name Cassidy, which has its roots in Irish and Scottish cultures. The name is derived from the Gaelic word "Ó Caiside," meaning "descendant of Caiside," a personal name that likely means "brisk" or "vigorous." Over time, the name has evolved and been adapted into various forms, including Cassidie. The use of the name has remained relatively consistent in its association with strong, adventurous personalities.
