| 8 May 1875 | 0 | -, Clarke, Iowa, U.S.A. | BIRTH. |
| 19 Sep. 1884 | 9 | Baileys Creek, Osage, Missouri, U.S.A. | DEATH: Of father John Henry O'Hara, age ~44. |
| 14 Jan. 1914 | 38 | Carnegie, Caddo, Oklahoma, U.S.A. | MARRIAGE: To Florence ("Flo") Timmer, age 20. |
| 24 Aug. 1915 | 40 | Mangum, Greer, Oklahoma, U.S.A. | BIRTH: Of son George Henry O'Hara. |
| 10 Sep. 1917 | 42 | Mangum, Greer, Oklahoma, U.S.A. | BIRTH: Of daughter Anna Marie O'Hara. |
| 3 Oct. 1919 | 44 | Mangum, Greer, Oklahoma, U.S.A. | BIRTH: Of daughter Annette Marguerite O'Hara. |
| 3 Jul. 1921 | 46 | -, -, Oklahoma, U.S.A. | BIRTH: Of son James Anthony O'Hara. |
| 26 Sep. 1922 | 47 | | BIRTH: Of child [UnknownG] O'Hara. |
| 26 Sep. 1922 | 47 | | DEATH: Of child [UnknownG] O'Hara, age 0. |
| 1 Sep. 1924 | 49 | | BIRTH: Of daughter Dorothy Gladys O'Hara. |
| 30 Oct. 1924 | 49 | | DEATH: Of daughter Dorothy Gladys O'Hara, age 0. |
| 13 May 1935 | 60 | +, Beckham, Oklahoma, U.S.A. | DEATH: Of spouse Florence ("Flo") Timmer, age 41: At home. |
| 29 Jul. 1959 | 84 | Elk City, Beckham, Oklahoma, U.S.A. | DEATH. |
| 31 Jul. 1959 | | Elk City, Beckham, Oklahoma, U.S.A. | BURIAL: Calvary Cemetery. |