"Etna" should actually be Etne in Hordaland, Norway.
http://www.rootsweb.ancestry.com/~norway/hordaland.htmlThe birth record for Jakob Eriksen b. 8 Jun 1883 - parents Erik Jakobsen and Kari Halvarsdatter born in Grindheim parish of Etne.
http://www.arkivverket.no/URN:kb_read?idx_kildeid=2122&i...Erik Jakobsen and Kari Halvardsdatter marry 16 Oct 1883 in Etne. The marriage record lists Erik as then residing on Grindheim farm and his father as Jakob Jonsen; Kari is listed as from Tesdal farm and father as Halvard Halvardsen.
http://www.arkivverket.no/URN:kb_read?idx_kildeid=2122&i...The 1900 Norwegian census indicates Erik and Kari living on Klakkene farm in Etne and shows several children still living at home.
http://www.rhd.uit.no/folketellinger/ftliste_e.aspx?ft=1900&...Their eldest son Jakob is living in Skudenes district of Rogaland (close to Stavanger) and calling himself "Nordheim" in 1900 -
http://www.rhd.uit.no/folketellinger/ftliste_e.aspx?ft=1900&..."Jakob E Norheim" came to the US in 1904, leaving Norway from the port of Stavanger and entering through Philadelphia. He states that he is headed for Roland, Iowa. (that is in Story Co.)
https://familysearch.org/pal:/MM9.1.1/23QV-L3SHe is in Story Co. Iowa for the 1905 Iowa State Census -
https://familysearch.org/pal:/MM9.1.1/23BG-G91Spelling was rarely consistent. For example here is "Kari Halvarsdatter" in the 1865 Norwegian census with her unmarried mother residing on the Pytten farm in Etne. Her maternal grandparents are probably (not proven) grandparents listed as the first two farm residents.
http://www.rhd.uit.no/folketellinger/ftliste_e.aspx?ft=1865&...All info and links from free online websites.