From "Lincoln County, Kentucky", pub. by Lincoln County Historical Society, Turner Publishing, 2002. pg 231:
... Prior to his death, William Montgomery, Sr. fathered several children, some of which would become prominent in the early days of the county.
- His daughter Ann married first, Benjamin Logan and later General James Knox.
- One of his sons, Alexander was killed in Ohio in the late 1770's while trying to recover horses that had been stolen by the Indians.
- Another son, William, Jr. known as "Black Billy" (we don't know why), served in Logan's Militia, was a member of the Kentucky Constitutional Convention in 1792, served in the state's legislature and was sheriff of Lincoln County from 1792 until his death in 1794.
- One of William Montgomery Sr.'s daughters, Jane, married William Casey and was the maternal grandmother of Jane Lampton Clemens, who was Samuel Clemens mother.