John Creighton Mottice, father of Grant Mottice, was evidently named for Peter Mottice's good friend John Creighton. Since John Creighton had a son of the same name who apparently married two of Peter's daughters, it is possible that John C. Mottice was named after the son rather than the father. Here are some key facts about John C. Mottice's family:
| Born | Place | Died | Spouse | Marriage | Notes | |
| John C. Mottice | 1838 | OH | 1906 | |||
| Wife: Catherine Gross | 1837 | 1901 | 1862 | |||
| Children: | ||||||
| William | 1863 | OH | ||||
| Grant Edwin | 1865 | OH | 1938 | Frances Dieringer | 1903 | |
| Ida Florence | 1867 | OH | 1914 | |||
| William Sherman | 1870 | OH | 1923 | Mary Rose Keck | 1899 | |
| Loretta Jane | 1873 | OH | 1937 | James G. Bowman | ||
| Rutherford B. Hayes | 1875 | OH | 1923 | |||
| James Garfield | 1879 | OH | 1957 | Lucy Ann Snyder | ||
| Corah Bell | 1877 | OH | ||||
| Lucy Anne | 1882 | OH | ||||