I don't remember following up on this.
If you are doing Scandinavian research I assume you understand the patrynimic naming and that the last name used was generally a farm or occupation name (i.e. Gullans farm).The south estern portion of Finland was controlled by Sweden in early 1800s and Băck would be pronounced as Beck in Swedish. I found resource in Finland who had a lot of information about the Overmark area of Finland and my family in particular. You can contact me @yahoo.com