Here's some additional information on the family dynamics:
Isaiah Weaver was born in Pennsylvania. On 17 March 1880 he married Jennie N. Rhinehart. They moved to Lincoln Co., Kansas in 1886 and to Stayton in 1897. They had 7 children, 6 of whom survived Isaiah. Their daughter, Cora, was the first wife of Jesse A. Hendershott.
Hendershott, Marie 1887-May 29, 1949 Hendershott, Jesse A. 1872- Mar 18, 1945
An old listing of this cemetery indicates there is an unmarked grave in this lot, and it is probably for Matilda L. Wiles, the wife of Hiram K. She was living in Stayton with Jesse A. Hendershott, as his grandmother, when the 1900 U. S. Census was taken. She is not listed on the ODI, nor has an obituary been found for her in the extant issues of the SML. She was not located in the 1905 Marion County Census, but neither was Jesse Hendershott (much of the Stayton area is missing from the 1905 census, however).
Marie Anna Hendershott was born 10 Feb 1887 in the Hazel Green area, near Salem to Nelson & Anna (Johnson) Williamson. She married Jesse Hendershott in 1915 in Salem. Marie's mother, Anna (Johnson) Williamson appears to have been a sister of Bertha (Johnson) Peterson, who is in Sec. 1 Lot 154. She is referred to in Louis Peterson's obituary as his niece. She was also his step-granddaughter as Peterson's daughter, Mathilda, married Marie's father after her mother's death.
Jesse A. Hendershott was the son of George W. & Della A. (Wiles) Hendershott and the grandson of Hiram K. & Matilda L. Wiles, who are in this lot. He operated one of the first confectionary stores in Stayton and continued in that business for many years.
I Hope this helps clear up some of the mystery! Happy traveling! Laura