Hi, I am D Black. I have been working on my family tree and since my mothers maiden name was Gregg, I have some info.
Found Marshall Gregg born in February 1838; married to Sarah Jane Snyder, December 1843- Decenber 29, 1921. Also found Masrshall Gregg born 30 June 1840 in of California, Moniteau, Mo; Married to Sarah Jane Snyder. Both have same parents listed. Attempting to locate more detailed info about both. Current tree (August 12, 2012) follows Marshall born 30 June 1840 in of California, Moniteau, Mo. I have listed as his father a George Addison Gregg, Oct 8, 1808 - Jan 18 1854, Born in Tennessee. Children
Harriet Gregg (1835 - 1911) George D Gregg (1844 - 1908) Mary Almeda Gregg (1850 - 1935) Mary Almeda Gregg (Born 1850) Caroline Mariah Gregg (Born 1842) Marshall Gregg (1838 - 1910) William Spence Gregg (1847 - 1923) Elizabeth Gregg (1837 - 1920)
Married to a Susan Mariah DeWitt Gregg, Mar 11, 1813,Oxford, Butler, Ohio, United States; died Apr 21 1895.
I have not been able to get back any further than George.
Hope this helps. If you get further please let me know. My tree is on myheritage.com