@Walter Hinteler,
"Genetically", I should actually know a bit more about it, but that's not the case at all.
Explanation:
When my great-great-great-grandmother was paid her share of the inheritance from the farm/mansion and land which was sold and married (her husband had still taken the name of the farm [Hinteler]), she bought a steam mill in the Ruhr district (today in the area of the city of Essen) as a widow.
They milled everything.
However, she sold this mill a short time later (it had probably become unprofitable due to the industrialisation of the area) and built a new ‘automatic roller mill’ in her old home.
The business, called ‘Hinteler Brothers, corn mechants and millers’, was the largest in the area and became the county's official mill after the First World War.
Grandfather was the chairman of the Supervisory Board of the Westphalian Mill Cooperation for more than a decade.
Unfortunately, the business was located within the town and completely destroyed in a huge air raid at the end of the Second World War (all female paternal relatives and a newborn baby died then as well).