Helena Knyazeva

As of my last knowledge update in October 2023, I don't have specific information about an individual named Helena Knyazeva. It's possible that she may not be a widely recognized public figure, or she may have gained prominence after that date. If you have a specific context or field in which she is relevant (such as arts, science, sports, etc.), I may be able to provide more tailored information. Please let me know!