Porphyrogénnētos (Latinized as Porphyrogenitus) (, literally "born in the purple") was an honorific title in the Byzantine Empire given to a son, or daughter (Πορφυρογέννητη, Porphyrogénnētē, Latinized Porphyrogenita), born after the father had become emperor. In addition to this, the birth had to meet other conditions in order for the title to apply.