I have been researching the Finns of the Owen-Withee area and know about this family you are interested in. In fact, my wife took Finnish-language lessons from a daughter of John and Sanni Nieminen in Owen in the early 1980's.
My wife and I made our first visit to Finland this past April. It would be my pleasure to share information with you be in further contact.
My e-mail: firstname.lastname@example.org