There's an Ohio death record for John Wesley HANNAN b. 20-Oct-1881 in Ross Co, OH, d. 11-Nov-1946, husband of Vina HANNAN.
There's an Ohio birth record for John W. HANNON b. 20-Oct-1881 in Harrison, Ross Co, OH, son of David HANNON and Ella T. CAVEY.
On the marriage record for John HANNAN to Vina Maxwell KEPLER on 20-June-1914 in Vinton Co, it states his parents were David HANNAN and Ellen CAVY.Her's were William MAXWELL and Mary GIBSON.
There's an OH marriage record for David HANNON to Elenor CAVEY on 24-May-1866 in Jackson Co, OH.
This is a possible match in the 1880 census for Liberty, Jackson Co, OH: HANNAN, David age 74 b. PA, father b. DE, mother b. Ireland wife Eleanor age 39 b. OH, father b. DE, mother b. OH dau Margaret E. age 9 b. OH dau Sarah E. age 6 b. OH