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.