Search for the lost relatives

I looking for the lost relatives of my grandma Mironova Veara Alexandrovna, ( Maslenicova) and Relatives of my Grandpa Antropov Nikolay Philipovicha. I know only she had a Twin sister who is lost during first month of the World War II in village of Elnya in Byelorussia by HKVD action. Last words she ends up in Canada. If anybody knows something about those people, do not hesitate to write me. Please, by the honor and trust given to me by that woman I am asking you to help me to find some information.