Casey

The name Casey is a unisex name that originated as an Irish surname, Caiside. The surname is derived from the Irish Gaelic word 'cádhas,' which means 'brave' or 'watchful.'

The name became popular as a given name in the late 20th century, initially more common for boys but later gaining popularity for girls as well. Its gender-neutral quality and easy pronunciation contributed to its widespread use.

For boys, Casey may have been influenced by the Irish legend of Caiside, a warrior who fought against the Vikings. For girls, the name's similarity to the feminine names Casey and Cassie likely played a role in its adoption.

Today, Casey is a versatile name that appeals to parents seeking a name with a strong, positive meaning and a unisex quality that allows for flexibility in gender identity.