Tromp, Frans 19??- Netherlands, ? / Groningen
trekharmonica 'trekzak' (concertina accordion) player and teacher, 1973 started to learn the concertina, c1978 he formed the concertina orchestra Eerste Utrechtse Trekzak Societeit (EUTS) in Utrecht and later the concertina orchestra Groot Langlopend Orkest Project (GLOP), 2002 teacher concertina in Groningen