I am researching this branch of my tree.Simon Marius Gilleberg was born to Peter and Christine Nielsen (Østergaard) on 16 Dec 1883.Marius lived in Iowa,for the 1900 census, with his grandmother (Marie Nissen Frandsen)He married a German-born Marie, and lived in Ludington, MI. I believe he also lived in Canada for some time. Marius had three other siblings - Martin Hansen, Marie Cecilie, and Cathrine Emilie. The various records in Denmark show spelling variations: GJELLEBERG, GILLEBERG, GILDBJERG. I welcome any information regarding this family. thank you.