Juliette Rosewood was a very powerful witch from the Rosewood Bloodline that grew even more powerful since her death. In 1919, Juliette grew more power hungry and sought out to take magic from her family members that were still alive (this excludes Edric) and take it for herself. She used a linking spell to herself and to members of her family but before she could get enough magic, she was stopped by Margaret Rosewood. She was the main antagonist in Season Six of the The Vampire Diaries.
Since she had return, she made a plan gaining magic from her current members of her family, this includes; Margaret, Charlotte, Amara, Lyla, Lucas, and as well as the Gemini twins; Madeline and Christopher Rosewood. According to Charlotte, Juliette was very powerful in her prime, and even more powerful than Margaret whom is way older than her.
Juliette was a member of the Rosewood Family.