First found in Belgium, where the name became noted for its many branches in the region, each house acquiring a status and influence which was envied by the princes of the region. The name was first recorded in West Flanders, a province in Belgium, originally Bruges. Within this province the notable towns are Bruges, the capital city, Ostend, Courtrai, Furnes, Thielt, Ypres and Roulers. In their later history the surname became a power unto themselves and were elevated to the ranks of nobility as they grew into a most influential family.

Some of the first settlers of this family name or some of its variants were: Elizabeth Barba Dahn, who settled in Nova Scotia in 1752; Elisabeth Dahn, who arrived in Nova Scotia in 1757; Jorg Adam Dehmer, who settled in Pennsylvania in 1765.

For more information on the last name Dahmen, the PDF Surname History is available for purchase as well as other products.