There were many German Rose families who had immigrated to the United States before 1850. One of the earliest and largest was the family of William and Elizabeth (Schoolcraft) Rose. Fortunately, the revolutionary pension file of their son Jacob Rose (National Archives W4578, micropublication M804, Record Group 15) contains a marvelous and detailed record of the family, providing the information that William Rose (Wilhelm Roos in baptismal record of children) was born 14 September 1738 in Hesse Cassel, Germany. He married, according to the same Family Record, on 30 October 1760, Schoharie, Albany County, New York, to Elizabeth Schoolcraft, born 25 December 1738, Schoharie, Albany County, New York. The William Rose family lived in Albany, Ulster and Delaware Counties, New York. Descendants spread into other New York Counties, and into Ohio and other states. An extensive research report is available on this family - contact the Rose Family Association at Christine4Rose@cs.com for details.
Though the above is one of the largest of the early German Rose families, many others came into the colonies, particularly into Pennsylvania and surrounding states. Later, Rose families are seen in large numbers in Minnesota, Wisconsin, Michigan and other states.