Mennonite records reveal most of the Dutch, Prussian, Russian and early South Dakota history of Dirksens. Seventh Day Adventist records reveal much of Pioneer Dirksen history in North Dakota. United States and Russian census records, Bureau of Land Management records, county court records, reports from living descendants, related genealogies and the bottomless well of the Internet provide more data. Alan Peters and the California Menonite Historical Society have provided the essential genealogical reference for people with a Mennonite surname. Is is the Genealogical Registry And Database of Mennonite Ancestry (GRANDMA).