Jan Mauda Hernych (born 7 July 1979) is a professional male tennis player from Czech Republic.
Born in Prague, he turned pro in 1998 and achieved his highest ranking (60) on July 4, 2005. He is currently 97th in the ATP rankings.
In 2006 he contested his first final on the Tour, losing to Mario Ančić in a tournament on grass in the Netherlands.