Stenseth or Stenset family in Over Eiker

Hello, I am seeking any information regarding the Stenseth (or Stenset) family in Eiker (Ovre Eiker) Norway. My Grandfather, Gustav Stenseth immigrated to the US in 1907. I know he married Anna Edit Karlson in North Dakota and they had 5 children. I'm looking for info on Gustav's family in Norway. Who were his parents, siblings, where are they buried, the name of the church they attended, what town they lived near.....any information. Thank you for any information you can provide. Thank you, Leslie Anthony