My branch of the Siebrands family, or what I know of it at this time, is from Butler Co. Iowa. I don't believe the Harm Siebrands you mentioned is the one that would be my Great Grandfather. I would be very interested in sharing information with you though. I am trying to link the Siebrands family in S.E. South Dakota and S.W. Minnesota to my branch. I feel there is a commom link but haven't found it yet. I have information on other Siebrands family members that I can't place yet as well.