I don't know the answers to all of those questions.
Mamiashvili is a former Greco World and Olympic champion and the head of the Russian wrestling federation. He took over the federation at some point after the breakup of the Soviet Union. I don't know who he replaced or when he became the head guy, but it's been a long time.
Dzhambolat Tedeev is an Ossetian who wrestled for Ukraine and got 5th at the 1996 Olympics in freestyle. I don't know if he is Elbrus Tedeev's cousin or brother. I think they are cousins. Elbrus won the Olympics and won worlds multiple times, including beating Kolat. I believe that Elbrus Tedeev now runs Ukraine's wrestling federation (I know he did for a while).
I don't know much about Tedeev's relationship to Mamiashvili, but Dzhambolat Tedeev was the head coach of the Russian team for quite a while. I believe he was under house arrest for a while when he tried to run for President of South Ossetia (or something like that - maybe someone else knows more?). He lost his job as head coach, and I believe was replaced by Guseinov. Then Guseinov was fired and Tedeev was rehired.
Sajidov is a former 2x world champion (beat Cael in 2003 finals). He is the head coach for Dagestani wrestling.
Kerimov is a Dagestani billionaire and politician.
Awesome, I really appreciate your taking the time to respond!