According to The New Penguin Dictionary of Music
, Jan Vaclav Stamic [Johann Wenzel Stamitz] was one of the chief members of a Czech family of musicians, originally named Stamic. He was a violinist and composer of violin concertos, symphonies, harpsichord sonatas etc., who became musical director at the court in Mannheim, 1745, and is regarded as founder of the "Mannheim School". The father of Karel Stamitz
, violinist and composer.