Robert Hogg, son of Robert and Anna Hogg, was born on February 22, 1817.
Mary Jane McFate, daughter of Alexander and Margaret (Mills) McFate, was born in Londonderry, Ireland, on March 15, 1823. Mary's father died in Ireland in 1835. Her mother Margaret, died in Pennsylvania in 1860.
Robert and Mary married in 1843 and had 10 children:
| John Alexander Hogg | Born March 29, 1844. Married Margaret Hall. |
| Robert Hogg | Born March 1, 1846. Married Jane Bryan, who died May 12, 1982. Then married Mary Christy. Died October 18, 1918. |
| Margaret Ann Hogg | Born April 16, 1848. Married Joseph Billingsley. |
| William Henderson Hogg | Born May 15, 1850, and died a year later. |
| Samuel Harper Hogg | Born June 5, 1852. Married Floreal Cook, then Sarah Wolford. |
| Elizabeth Jane Hogg | Born April 7, 1854. Married John Mills. |
| Sarah Rebecca Hogg | Born March 20, 1856. Married Otis J. VanDyke. Died September 14, 1939 |
| James McCoy Hogg | Born June 26, 1858. Married Mary Arner. |
| Mary Florinda Hogg | Born May 12, 1860. Married Reuben Fisher. Died March 4, 1942. |
| Isabella Hogg | Born December 15, 1862. Lived less than a month. |