Maiden name and parents are still a mystery to me. DByron states her name was Seymour and that her parents were John Stokley Seymour and Lucinda J. Moore. Mystery solved: John Seymour's will lists Adeline and Ollie as his step daughters!

Items that I have are:
1) Genealogy Data, May 2, 1963, from Beulah Mae Dishon Ingram to her brother, LeRoy Dishon states:
Grandma Seymour was married to a Waddell and had Mama (Addie) and Ollie. When she was left a widow, she then married Grandpa Seymour and their children were William, Meritt, and Ida.

2) Missouri, County Marriage, Naturalization, and Court Records, 1800-1991
Name:
Thomas Waddle
Event Type:
Marriage
Event Date:
11 Aug 1863***
Event Place:
Clay, Missouri, United States
Spouse's Name:
Lucy Moore

Missouri Marriages, 1750-1920
Name:
Thomas Waddle
Event Type:
Marriage
Event Date:
11 Aug 1863***
Event Place:
Clay, Missouri, United States
Event Place (Original):
Clay, Missouri, United States
Sex:
Male
Spouse's Name:
Lucy Moore
Spouse's Sex:
Female

*** Addie was born Aug 8, 1865 and Ollie was born March 14, 1868. Lucinda married Thomas Waddell on August 11, 1863 and did not marry John Seymour until September 24, 1873. John Seymour's FAG MEMORIAL ID
91697534

3) Addie is listed as Waddle on her marriage document to Grant N. Dishon
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Middle and maiden names; location of death and link to parents provided by
D Byron FIND A GRAVE ID 50524098 Feb. 16, 2021. He lists her maiden name as Seymour but according to the evidence we have it was Waddell.

Addie married Grant Dishon Feb. 18, 1884 in Buchanan County, Missouri.

They had 10 children: Buelah Mae (Swigett), Elizabeth Margaret (Webster), Cordelia, Walter Raymond, Osa Thomas, Grant N., Byron A., Cyrus L., LeRoy and Adeline (McKernanr)Dishon.