Sergey Viktorovich Diomidov (Russian: Сергей Викторович Диомидов; born 9 July 1943) is an Uzbekistan former gymnast who competed in 1964 and 1968 Olympics. He won team silver medals at both Games and a bronze on the vault in 1968. …
Click PLAY or watch his eponymous skill on YouTube.
You can watch Sergey himself training it in this edit of him and coach Konstantin Karakashyants before and during the 1966 World Championships. Click PLAY or watch him on YouTube.
https://youtu.be/-7V2p5yyISg?t=3m39s
I’ve often seen his name spelled “Diamadov”. Or “Diamadov”. The Code of Points uses Diamidov though I don’t trust Code spelling in general. Of course you can use Sergey or Sergei.
When in doubt I usually use the wikipedia translation which has (hopefully) been widely crowdsourced. @papaliukin likes Diomidov.
Gymnastics Coaching.com 