Name of father Alvie Davis
Name father Mary E. Ridinger
[Note - she was born Opal Meree Daws, and was adopted by J. A. and S. M. Ridinger 8 Nov 1909 in Marion Co. Oregon. There is a possibility the DAWS was a misreading of the name DAVIS, which was the married name of Mary E. Ridinger, the daughter of John A. and Sarah M. Ridinger. Mary Ridinger, who was divorced from DAVIS by the 1910 Census record] 
1910 OR CENSUS - Opal M. Ridinger, age 4, b. Oregon, is enumerated as daughter (adopted written to the side) in the home of John A. Ridinger, age 56, farmer, b. Illinois, and his wife of 32 years, Sarah M., age 48, b. New York, along with Mary E. Davis, identified as daughter [of John], age 29, divorced, mother of 3 children 1 of whom is living at the time of the census, b. Kansas, and Nicholas M. Ridinger, single, identified as brother [of John], age 54, occupation farm laborer, b. Missouri.
1920 CENSUS - Opel [sic] M. Ridinger, age 14, b. Oregon, is enumerated as a granddaughter in the home of John A. Ridinger, age 66, b. Illinios, and his wife Sarah M., age 58, b. New York. Also enumerated are John's brother, Nicholas M. Ridinger, age 63, single, a hop farm laborer, b. Missouri, and a great-grandson, Vernon, age 4, b. Oregon.