Cathleen

Cathleen is an Anglicized form of the Irish name Caitlín, itself derived from the Old French Cateline, a medieval adaptation of the Latin Katharina. Katharina traces back to the Greek name Aikaterinē, whose meaning remains disputed but is often associated with the Greek word katharos, meaning pure. The name gained widespread use across Europe largely through the veneration of Saint Catherine of Alexandria. Closely related forms include Kathleen, Katelyn, Catherine, and Katherine.