Shenandoah was a popular song among cowboy singers as well as everyone else.
Austin E. and Alta S. Fife, 1969, "Cowboy and Western Songs," reproduce the version by W. B. Whall, "Sea Songs and Shanties," 1910, which is the earliest version found in print.
This version is about the love of a white man for the daughter of the Indian chief Shenandoah. Whall's version is mentioned in thread 4257: Shenandoah
I believe that the Sons of the Pioneers recorded a version years ago, but not sure.