Dagen Is A Masculine Name Of Irish Origin, From The Surname Ó’Dubhaigan, Meaning “black-haired.” This Handsome Title May Have Mirrored The Defining Trait Of A Family With Black Hair And Has, Over Time, Evolved Into Deegan, Dagen, And Dargan. Dagen And Its Variants Are Surnames Still Found Throughout Ireland And Abroad Today, Making It A Dapper First Name For Parents Wishing To Honor Irish Ancestry. Regardless Of Baby’s Heritage, Dagen Is A Distinct Appellation With Which Baby Can Express Their Individuality.