From Philippe Lanez, "Could I suggest HARTMANN. Interwoven H is the vital first letter of the family name. Doubled H , maybe brothers or father & sons in the company. There is space for two initial letters of two fore names between point and "H". The Hartmann name is still present in the place nowadays. Kenneth Højlund, I think you have to refer to local economic history. The interwoven Hs are over waves or steam of a river."