Juliana Tainer
- Full Name: Juliana Tainer (née O'Donnell)
- Species: Soong-type android
- Formerly Human (TNG: "Inheritance"; TNG Novel: Immortal Coil)
- Gender: Female
- Husband: Noonien Soong (2328 - 2338 - )
- Son: Lore
- Son: Data
- Husband: Pran Tainer ( - 2370 - 2374)
- By 2328: Resident, Omicron Theta (TNG: "Datalore", "Inheritance")
- 2338: Death; interstellar space near Omicron Thera (TNG: "Inheritance")
- Succumbed to injuries incurred during attack of the Crystaline Entity (TNG: "Inheritance")
- Mind successfully transferred into a Soong-type android by Noonien Soong prior to her body's death
- 2338: Resident, Terlina III (TNG: "Inheritance")
- By 2370: Resident, Atrea IV (TNG: "Inheritance")
- Death: Early September 2374; Atrea IV (TNG Novel: Immortal Coil)
- Simulated natural causes (TNG Novel: Immortal Coil)
- Repaired and resurrected by Akharin (TNG Novel: Immortal Coil)