This website contains all information known about the descendants of Johann Heinrich Nordsiek, father of Friedrich Wilhelm (Willem Frederik) Nordsiek. My father, Johannes Nordsiek (Amsterdam, 1935, July 9) started the search for his ancestors, and I (Edgar Nordsiek, Enschede, 1968, September 27) am trying to continue his search.
The name Nordsiek originates in Germany, as where "siek" or "sigi" means swampy lowlands. "Nord" referres to north. The name Nordsiek therefore can be explained as swampy lowlands in the northern part of the town / region.