Eudokia (daughter of Constantine VIII)

Eudokia Porphyrogenita (Greek: Ευδοκία Πορφυρογέννητη, romanized: Evdokía Porphyrogénnētē; c. 976/7 - after 1001) was the eldest daughter of the Byzantine Emperor Constantine VIII and Helena Alypia, and part of the last generation of the Macedonian dynasty along with her younger sisters Zoe and Theodora.

Her uncle Basil II was the senior Emperor until his death in 1025, and did not allow his nieces to marry Byzantine aristocrats to avoid giving their would-be husbands a claim to the throne. Accordingly, Eudokia, like her sisters, lived in relative obscurity in the imperial gynaeceum. According to Michael Psellos, at some point in her youth, Eudokia contracted an infectious illness that disfigured her face, and subsequently became a nun. The exact timing of these events is unclear, but in 1001 Eudokia was rejected as a potential bride for the Holy Roman Emperor Otto III in favor of Zoe, on account of her disfigurement. Nothing further is recorded about her.