Title: The Petrova family
Tatia and Marik Petrova- Mother and father of Nicolette and Coralina; Tatia was sacrificed so the Mikaelson family could become vampires.
Nicolette Bane Petrova aka Nicki Bane- Daughter of Tatia and Marik; elder sister of the doppelganger Coralina, mother of Roark, her illegitimate son. Former lover of Klaus Mikaelson.
Coralina Petrova- Doppelganger that was sacrificed to bind Klaus; younger sister of Nicki.
Roark Petrova- The illegitimate son of Nicki; he was raised by his great aunt and uncle.