I know of a Marie Schroeder--nickname Frederica-- who was the third wife of a Carl Herzog. They married in 1838. They had seven children, or had some of them from previous marriages. Charles "Carl" W. Herzog apparently signed papers so that Frederica could emmigrate to the United States. This took place in 1870. The childeren were born around 1850-1860. I found gravestones in Montogomery County, Hatfield Cemetery, Pittsburg, Pennsylvania. The childeren were Charles H."Harry", Lena, Minnie, Frederick Wilhelm, and Caroline. I also have a picture of the Herzog family and Frederica. I do have more childerens' names but can't think of them all off hand. The Herzog family would become the Hertzog family when Frederica came over to the United States. They apparently traveled from Bremen to New York on their way over here. This is really all I know of the Schroeder name. Any information regarding the Herzogs, or Hertzogs would be much appreciated. Charles Herzog apparently was a member of the Signal Corp of the 41st regiment in New York in the Civil War (he fought for the Union) before being discharged in 1864-1866.