The James M Elledge who married Kate Grady died in 1907 and is buried in Kerr Co, TX. So I think that's a very good sign that his brother named Clarence is the one you are looking for.
Their father's name was J M Elledge as shown in this 1860 census listing. The son, James M, was probably named for him.
1860 United States Federal Census Precinct 1, Lamar Co, Texas J M Elledge 28 m farmer $0r $400p AL M C Elledge 27 f TN F M Elledge 6 m AL J R Elledge 5 m AL A J Elledge 4 m MO Mary Elledge 3 f MO Mart? Elledge 6m m TX
Minerva's gravestone is shown on findagrave.com. The listing there says that her maiden name was James.