sentences:  For twelve generations the Prym family has been operating from the city of Stolberg, Germany, making and marketing semi-finished copper and brass products as well as haberdashery.In the 17th and 18th century they contributed substantially to establishing the local brass industry and its development towards international reputation.Johann (c.1340-c.1420), whose name is documented in a medieval register in Aachen, is referred to as the oldest ancestor.