Olverson

I have read the description on Norwegian names. I understand the basics but I am still as confused as many others seem to be. Oral history indicates my great grandfather (Thomas Wilson) was named Olsen. A likely mathch from Australian archives is an Olverson. Unfortunately no Olversons are recorded in the 19 Century Noewegian Census. Was there an insert in the middle of the name? ie Olsen Ol - ver - sen? The home port of the ship he deaserted was Tvedestrand. He initially worked in South Australia as a farm labourer so he may have had a farming background. Information on marriage and birth certificates is contradictory and uninformative. His father is recorded as Thomas Wilson also. Comments would be appreciated. Peter[:)][:D]