!!! 09-04-2017 I did not locate an obit for Minnie that fit with these names 
 source: Oklahoman Digital Archives (newspaper)

Oklahoman Archives 
Oklahoma City, Oklahoma County, Oklahoma
September 28, 1960, pg 10

Services _Pend
For _McDonald

W. M. McDonald, 68, of 1517 NW 44, died Tuesday in his home. Services are pending at Hahn-Cook Funeral Home. McDonald was born in Bell County, Texas, and came to Oklahoma City in 1929. He had been an employee of Crippled Children's Memorial Hospital 13 years. He was a member of First Methodist Church.

Survivors include his wife, Minnie, of the home; two sons, Jeff B., Washington, D. C., and Lt. Col. J. A. McDonald, Dayton, Ohio; two sisters, Mrs. W. H. Morris, Tishomingo, and Mrs. A. J. Gosselet, Haskell, Texas.

source of stone image