Olya Ivanova

Olya Ivanova was the daughter of Old Ivan and resided in the Village of Barovia. Recognized by Strahd as a reincarnation of Tatyana, she was claimed and taken to Castle Ravenloft. Strahd commented that she seemed to be only a fragment of whom Tatya was. Olya died in 475 BC of fever, leaving her father mad with grief.
Her description and conditions sound vaguely similar to Anna, another reincarnation of Tatyana. It is possible they were somehow directly linked.