Severin Thompson aka Eller Bortnos

Said to have been illegitimate child of Eller Bortnos and Eli Mukklebostat born in Mekinok, North Dakota on 20 Nov 1878. Claimed by Elias Hermanson Thompson and went by name Severin Thompson in US. Father was Elias Hermanson ? born in Norway 18 October 1856 in Dale Parish, Luster, Sogn Og Fjordane. Mother thought to be Eli Rasmussen Mukklesostat also called Elen Rice born 18 May 1851 in Innvik, Nordfjord, Norway. Any help appreciated.