Tatia Petrova

Tatiana "Tatia" Petrova is a Petrova doppelgänger with whom both Niklaus and Elijah Mikaelson fell in love in the late 10th/early 11th century. She is the first-known doppelgänger to be created from Amara's line after her earliest known ancestor was turned into a true immortal in the 1st century B.C. Elijah and Niklaus' mother used Tatia's blood to turn them into the world's first vampires, which eventually led to her death at the newly-turned Elijah's hands. After her death, her blood was used in the spell that bound Niklaus' werewolf heritage. She was finally resurrected by Lucifer, Elena, and Bonnie in 21st century.

Tatia is a member of the Petrova Family. She also has ties to the Bennett Family, Labonair Family, and Mikaelson Family through Lucifer.