Roald Amundsen

Looking for information on a possible connection to Roald Amundsen. My great grandmother spoke of playing with her little cousin Roald and my grandmother told of going on board the Gjoa when it returned to Norway from the Northwest Passage. My great grandmother is Petra (Roed) Johnson - her parents were Mathias Roed and Oline Olsen. Petra told tales of playing on Hvaler as children. We have heard the tales but cannot find the actual connection on the tree. Would anyone be able to give me information. Colleen Day