I apologize for not listing the siblings. I did find that census record in my initial search. I wasn't positive about the state in which his sister's were born because the handwriting is hard to read. However, I still haven't been able to find any information for the sisters after they reached adulthood. Whether or not they got married is up in the air.
I did find a marriage record for Anfin's brother Peter and that is where I found the Anfinsen connection for Susan (Synneve). I however have not been able to locate Peter's birth or baptismal records in the Norwegian archives.
I had at one point found Anfin spelled Arnfin, Amfen and Amfin. Anfin usually went by Olai or A Olai from what I have found. I do know according to the family that Anfin owned ageneral store in Iowa and that he supplied groceries and other items. Unfortunately for my grandfather, Anfin died of blood poisoning when my grandfather (Joy) was only 4yrs old so he really didn't get to know his father at all, nor the family history very much even though he had 7 older siblings.