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 Hainault, a province in Belgium, based on the ancient county of Hainaut. Within this province the notable towns are Mons, the capital city, Charleroi, Tournai, Soignies and Thuin. 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: Caspar Dollman, who settled in Philadelphia in 1753; Christ. Dulman, who settled in America in 1776; Francy Dollman, who settled in New Orleans in 1820.

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