Halvorson, father of Carol & Paul born in Shasta County,CA

I'm looking for relatives of my mother's father. All I know is his last name isHalverson or Halvorson. He may have been from ND, possibly the Van Hook area.

My mother's name at birth was Carol Joyce Halvorson & shewas born in Shasta, CA on Feb 19, 1941. Her brother is Paul Lawton Halverson, DOB Jan 6, 1939, also born in Shasta, CA.

Their mother is Eleanor Lorencia (also spelled Lawrencia) Jensen, born in Minneapolis, MN on Apr 28, 1915. Eleanor Jensen lived in the following places: Van Hook,ND, Yuba City, CA & North Butte (not sure which state). She was the daughter of Hans & Alfhild Caroline Hammer Jensen & had 3 sisters, Ruth, Helen & Alice.

My mother & uncle took the surname of Washburn. I don't