Alexander Alexandrovich Kotov - b.12 August 1913 – d. January 8, 1981
http://en.wikipedia.org/wiki/Alexander_Kotov
"A number of questions remain. For example, although it has been determined (via an obscure, indirect reference unearthed by Bernard Cafferty) that Kotov was indeed married, beyond this colorless statement, we know nothing." http://www.chessville.com/misc/History/PastPawns/KotovUnderAnalysis.htm
Viktor Kotov - b. 7 Mar 1986 - In terms of age, Viktor could conceivably be a great grandson. However, Kotov seems a common name.
I have a couple of questions about Alexander Kotov,author of Think Like a Grandmaster, was he ever married if so did he have any children ? Well I was looking up his games on the chessgames.com, Victor Kotov name came up as well (he played 4 games lost 3 and drew 1 during 2001-2003, rating over 2000) is he related to Alexander ?