I have come across the name Friedrich Heinrich Hartung in the 1921 census of Haderslev...with wife Heleene born in 1862 in Mastrup, Heleene came to Haderslev in 1889 according to the census ....since my Grandmother Conradine was born in 1887 and went by the name Nissen, I'm wondering if Hartung was her stepfather? Can anyone tell me where Mastrup is? Also in the household in 1921 is a daughter Maria Margarethe. The Friedrich Heinrich Hartung of this census was born in 1867 perhaps a bit young to be the head of the Shoemaker's Union...was he the son of the Shoemaker? Any information on this family will be greatly appreciated.