Fritjoff (Fredrick) Lawson

Hi, My gr. Grandfather was Fritjoff Lawson (USA spelling), son of Lars Lawson and Meren Johanna. He was born in Christiana, Norway in 1867. He left Norway around the age of 11 on the Columbia as a cabin boy. I have no information about the family he left in Norway or have found his name on any ship lists. The family claims he had a tale of his ship being shipwrecked in the ocean and he was saved by the natives because they had never seen a white boy. This could be just a tale. I would appreciate any information you could give me. Thank you, lan