There are some pictures of them with their mother in the old thread for Olga Alexandrovna, which is now locked. To make it short, she had two sons - Tikhon Kulikovsky, born 1917 - died in 1993, and his younger brother Guri (I've also seen it spelled as Yuri, but I always say Guri). born 1919 - died 1984. I don't know much about their wives, however Olga's four grandchildren are still living.