Hi Susan,
I did not read through all the postings on "Oien" before I posted the answer to Tracy., but reading through your posting on Sigurd Christian I'm sure it is the same one I have traced in Norway, the dates certainly match .
Sigurd's parents are Peter Martin Øien and Anne Birgitte Nilsdatter. Peter's father, Peder Kristian Øien was a Master Taylor in Trondheim, Norway. I have a lot more information, including a picture of Peder's house in Trondheim.
I met Sigurd's granddaughter, Karen, who is the daughter of Freda, Sigurd's oldest daughter. Karen have only met Donald's children (her cousins) many, many years ago and is very keen on finding both US and Norwegian family members. If you let me know your, and Tracy's, email addresses I will send you all the info I have to date.