I'm not from your line but I do maintain the Orrell family Database. I have a lot of info on your line.
William M. Orrell's parents were James Robert Orrell Jr and Elizabeth Gullet.
There is some question on William's marriage. I show him married to a Louise in the 1880 Census.In the 1895 Clarksville Directory his wife was Lula. In the 1900 Census his wife was Harriett. It's very possible these were all the same person. Maybe you can enlighten me on this?
Children were: Leland, Hugh, William, James, Louis, Ruth, Otto, Nannie and Lady.