Finding Norway and Shetland connections

Hi I am researching my family and have just found out that on my paternal line we come from Norse Vikings in Norway. I was wondering if there would be any of my ancestors descendants still living in Norway and/or if anyone could help me with my genealogy in Norway? My surname is Blanch - it was in Shetland Blance and previously Blanx or Blanj. We have undertaken a DNA study and the administrator of the study thinks the name may have originally been Bljanson /Bljansen or something like that. Would appreciate any help.