I don't have any of the Wilhelms you mention in my database. Do you have more information on Sophie Mohle Wilhelm's husband's ancestors?
My Wilhelms went to Benton County, Oregon about 1872. None of them ended up in Portland until nearly 50 years later. When they emigrated from Germany, they came from Dienheim (near Oppenheim). There were two brothers; Adam & George. Maybe there were cousins as well... I don't know. It would be great to find a connection.