Margaret (wife of John Horner) was Margaret Riley, daughter of John W. Riley b 1800 and Caroline Dove b Jul 1807.
Henry C. Ashcraft, son of Amanda Jane Horner and Gilbert Ashcraft married Barbara E. Preston, b 1 Sep 1885 d 18 Apr 1953. He died on Nov 1966.They are buried at Oak Ridge Cem., Coshocton, Coshocton Co., OH. Henry was Probate Judge - Licking Co., OH.
I believe that your Joseph W. Horner Abt 1871 and William J. Horner is the same man.
There is another girl:Lulabelle Horner b 1875 d Dec 1949 and she married Melvin Bryan b 1877 OH and died Jan 1960.They had one daughter that I know of:Bernice Bryan b 1905 d 1982.Bernice had one child, Margaret Bryan and she married Ronnie Camp, son of Norman Camp.