do  Roupen Altiparmakian and John Matoian work in the same industry?
Roupen Altiparmakian Roupen Altiparmakian is a master of the violin and oud, born in Adana, Turkey.
Jean Althen Jean Althen (Hovhannès Althounian; 1709–1774) was an Armenian agronomist from Persia who developed the cultivation of madder in France.