The Texas death certificate for a James D. Pilkington gives his father as Jessie Pilkington and his mother as Sarah King.(The d.c. gives cause of death struck by lightning, killed instantly.)
There is a marriage record for Jesse Pingleton who married Sarah Keen, 12 July 1860 in Grayson Co. TX.The original image is not available to check the name.I feel sure it should have been Sarah King.She would have been only about 15 years old so this was probably her first marriage.The findagrave site for her burial seems to indicate her maiden name was King.Her tombstone shows her as wife of Wm G. Daniel, as you indicated.
As you might imagine, the name Pilkinton, Pilkington, Pingleton gets spelled many different ways.
Although I do not find a connection to my Daniel line, I have been interested in looking at your posting history for Daniel/Daniels.My first known ancestor was Josiah Daniel, b. 1784, NC.