My wife has some shirt-tail relatives named Willer.I believe Friederike Thomas married Henry Willer. They lived in Milwaukee, WI. Henry died 17 Jun 1993. Some Willers wrote in German in the autograph book of Pauline Thomas in the year 1881. They signed their names: Anna Willer, L. Willer, Pauline Willer, Henry E. Willer. That's all the information I have.