Christen Hansen Ulland family

I am trying to determine Christen Hansen's children. Chisten, son of Hans Urlien and Sonov Andersdr. was born July 9, 1782 at Urlien, Faberg. He married Sonov Andersdtr. and I believe they moved around a bit. How is one to know for sure who their children are. In searching birth records using their first names, I have found what I believe are possibilities: Sonov Gronlien, b. 15 May 1826, Marthe Gronlien, b. 12 Mar. 1828, Berthe, b. 10 Aug. 1830 Lier, Erich, b. 26 Feb. 1832 Lier, Matthias (my grandfather), b. 15 Feb. 1833 Lilleulland and Peder, b. 12 Apr. 1836 Lilleulland. Since there are no census records available at this time, is there any way to know if these would be their children, or if there are others? Thank you to anyone who may have advice on this. -Dusty