The 1865 census for Hemne lists
Amund Eriksen b 1839 in Hevne
Berit Ingebrigtsdtr b 1842 in Hevne
Johan Amundsen b 1861 in hevne
Erik Amundsen b 1865 in Hevne.
Father, wife and two sons living at Selnæsmo in Hemne.
To confirm any dates you really need to check the churchbooks.. I believe you may see them or order them to a LDS centre.
I am not familiar with the area myself.