Good morning Dennis.
I never did discover who this Olaf was in this particular situation. It does look like the Olaf had a son named Ottar based upon the information in the death certificate I noted. What caught my attention was his coming to America with my ancestor Ole. The information does appear to indicate some level of connection between the two immigrants, but Olaf was already associated with living in America as I read the information.
Have you done any research with the Norwegian archives?