Martha was the daughter of John Sizemore (1810-1853) & Frankie Virginia "Jennie" Arms-Sizemore (1807-1852).

Martha was the sister of:
1. Calvin Sizemore (1833-1885),
2. Ann Caroline Sizemore (1837-1892)
3. Elizabeth "Betty" Sizemore-Rose (1839-Deceased)
4. John William Sizemore (1843-Deceased)
5. Lydia Sizemore (1845-Deceased)
6. Frankie Jane Sizemore (1847-1919)
7. Franklin T. Sizemore (1847-Deceased)
8. Gideon Sizemore (1850-1906)
9. Sarah Sizemore (1852-1854)

Martha and her family were Cherokee Indians. Martha avoided the Trail of Tears by migrating with her grandfather in 1835.

Martha married Numa Dink Walker (1829-1884) around 1853.

Martha and Numa were the parents of:

1.Frances "Frankie" Ceberry Jane Walker Bailey Thomas (1854-Deceased)
2.John Wise Council Walker (1855-1940),
3.Numa Captain Calvin Walker (1857-1919)
4.Mahulda "Hulda" Elizabeth Walker (1859-1935)
5.Charles Gideon Christian Walker (1864-1892)
6.Martha Ann Charity "MAC" Walker Mills (1865-1936)
7.Pyrrus Ulla Chananey Walker (1867-1902)
8.Christopher George Columbus Walker (1869-Deceased)
9.Narcissa Emily Walker-Mills (1874-1952)
10.Lydia Merinda Cerdula Walker Walker (1874-1923)
11.Nyanza Nicti Cerulean Walker Walker (1879-1943)

While her husband, Numa, was serving in the Civil War, Martha would bring the horses in the kitchen on the dirt floor so they would not be stolen by soldiers.

Once Martha heard a commotion in the hog pen, she grabbed a butcher knife and went out to see what was in the pen with the hogs. She was confronted by a black bear. Martha killed the bear with the butcher knife.

On December 24, 1899 a number of family members had gathered for the annual hog killing which was a favorite event among hill people. Martha was present at the fire which was essential to the forth coming kill. She was caring for her eight months old granddaughter, Ada Walker, at the time. Unexpectedly Martha passed Ada to someone else and remarked "Take care of her." She then started toward the house and collapsed, stricken ill. She was carried into the house, her death occurred early that snowy winter night. Grover Walker, a boy of 9 1/2 years of age was present for his grandmothers funeral. Her body was carried from the Walker Home in a homemade coffin, placed on a sled drawn by a horse and taken down the mountain to the Keaton Mills Cemetery. She lay peacefully there under a native field stone as a memorial to her for the next 22 years. A granddaughter, Dola Walker Auer, had an adequate headstone replace the fieldstone in about 1921.

Numa is buried on a hillside a few miles from this cemetery, on the west side of Egeria, which at the time of his death was part of Numa and Martha's homested. When some of the land was sold the new owner showed no respect for Martha and when she died he refused to let her be buried next to Numa. She does, however, rest in a grave next to her son, Numa Captain Calvin Walker.