| John Otten (1821 - 1899) |
|
| Elizabeth Portlock (1826 - 1912) |
| Gilbert V. Markham | Mary E. Otten |
| b. about 1849, Michigan d. before 16 January 1920 br. occ. R. R. Engineer rel. cen. 1 June 1880, Burlington, Des Moines County, Iowa prc. |
b. circa 1852, Iowa d. br. occ. rel. cen. 1856, Burlington, Des Moines County, Iowa prc. |
| Frank Markham Maud Markham |