Notes:
Data source is the 1990 book, "Moomaw-Mumma-Mumaw-Mumaugh Genealogy" compiled by Robert Austin Moomaw (deceased).
His birth/death is listed in the book "Someone you Knew", Shenandoah County Obituaries, 1869-1989. It is claimed that he was married 6 or 7 times and fathered 18 children. I have 14 listed for him.
1850 Census, Virginia, Shenandoah Co., 58th District, 25th Sept, 1850
Jacob Mumaw, 28, Farmer, b. VA
Mary Ann Mumaw, 29, b. VA
Erasmus Mumaw, 7, b. VA
Catharine, 5, b. VA
Sarah L. 2, b. VA
1860: Mount Clifton, Shenandoah, Virginia
Jacob Mumaw 38, day laborer
Mary Mumaw 37
Catherine Mumaw 15
Sarah Mumaw 13
Lydia Mumaw 10
John Mumaw 8
James Mumaw 7
George Mumaw 1
Jacob cannot be found in the 1870 census in Ashby Township of Shenandoah County by a page by page search. One son, James appears to be living in the household of Thomas Miller.
Listed in the 1880 census living with his 4th wife, his son from his 3rd marriage and a step child. Elizabeth, the wife was sick in bed the day of the enumeration.
1880: Ashby, Shenandoah, Virginia, USA
Jacob Mumaw 61, laborer, b: VA/PA/VA
Elizabeth Mumaw 28, wife, b: VA/VA/VA in bed with chills
Washington Mumaw 7, son, b: VA/VA/VA
Rhoda Nicholson 4, step dau, b: VA/VA/VA