I have references of Schweyers from earlier times. I present them for your perusal. We reportedly come from north of Berlin, Alsac-Lorraine area, Wuerttenberg, and a few other locations. There is enough information to tease, tantelize, and just drive you nuts.
Spelling is another problem.
His residence was the island of Hiddensee. He died in 1213. Conrad lived and died around Rebuick in Hessen. So did Augustus. From there, the three sons and their descendents, spread over Nassau, Hesse, Frankland, and Baden.