This answer is excellent! I would add that you can try name variations, endings of sson, sen, son and datter, dater, dottir, dotir, dr, dtr. Church records are hard to read, but Scandinavian countries began doing censuses in the 1800'S. Usually, only landowners were shown as head of household, with workers and their families showing as members of the house. One of my ancestors started with the name Tallaksson and when he emigrated, he became Tallaxen, then Tallesen.