Jirov & Maskaev were ethnic Russian from Kazakhstan. Golovkin, Shumenov are the most relevant now as mentioned Some of their top amateurs are Serik Sapiyev won 2005 & 2007 World Championships Bakhyt Sarsekbayev won Gold at the Olympics Bakhtiyar Artayev won the 2004 Olympics and was awarded the Val Barker Trophy for most outstanding boxer. (So did Jirov at 1996 Olympics) Sarsekbayev is probably too old but i hope the other 2 turn pro.