John S. Mosby's brother was William Harrison Mosby. He was born December 28, 1845 in Charlottesville, Virginia and died August 27, 1913 in Bedford County, Virginia.He married (1) Lucy M. Booth, d/o John Henry Booth and Mary M. ________, (2) Mary B. Wilson.
If you go to the John Singleton Mosby museum site there is a brief listing of Ancestors, Descendants and Siblings. I went to Yahoo, then down the categories to History, then punched in the name John Singleton Mosby. This brought me to a site with several links.I was looking to clarify a Harris lawsuit when I found this.I do not research the Mosby family.I am passing this on as a help to preserve another piece of history.