Ondrej Silt
After having spent 3 years as an insei at the Nihon Kiin in Tokyo, Japan, he is currently one of three 6-Dan players in the Czech Republic.
His talent was spotted by Hans Pietsch at an amateur world cup (in which he placed 4th) at the age of 12.
The last tournament result I found was an 11th place in The ING Memorial European cup, after scoring an overall win in the 2004/2005 European Cup. In 2010, he placed 5th in the World Amateur Go Championship with 6 wins. He also played in the 2006 WAGC, scoring 6 wins and placing 8th.
Currently, Ondrej Silt is 23 years old (2010).
European Go Database page: http://europeangodatabase.eu/EGD/Player_Card.php?&key=10337481