I'll make this change to the research notes for Mary Jackson, but I wanted to put it here first as a discussion post. It felt rude to barge into a record that somebody else created and suggest a bunch of big, sweeping changes.
I think that Mary Jackson should be changed to Mary Field, and she should be unattached from the parents she has now.
Here's my thinking:
There are two possible names for Mary, wife of William Powell - Mary Field or Mary Jackson.
I can only find one source listing a birth name for Mary. When her son, John, remarried, he listed his mother's maiden name as Mary Field. Her son, Robert, lived long enough to receive a Missouri death certificate, but the informant, Robert's son Bert, listed Robert's father as William Powell and Robert's mother as "not known."
In most online family trees, Mary's name is given as Mary Jackson. I tried to find any kind of source for the name Jackson, but I couldn't find it.
Sometimes, a Carroll County, Kentucky marriage record for William Powell and Mary Jackson, daughter of Jesse Jackson, is given as a source. But that marriage occurred in 1869, and according to the record, the groom was 17, and the bride was 16. In 1869, William and Mary would have been 73 and 61. So that record belongs to a different William Powell and Mary.
Mary is often listed as the daughter of Jesse Jackson and Hannah (or Rebecca) Rhoads. This is probably wrong for three reasons.
On the 1880 census, Mary reported that her parents were born in Maryland. Jesse Jackson was probably born in Virginia.
Jesse Jackson raised his children in Muhlenberg County, Kentucky. Mary's husband, William Powell, lived about 250 miles northeast, in Fleming County, Kentucky. They're both from Kentucky, but very different parts of Kentucky.
There was a Mary Jackson born in 1810 who married Richard Cundiff in Muhlenberg County, Kentucky in 1836. This Mary Jackson was probably Jesse Jackson's daughter, not William Powell's wife.
Mary Field is the winner, I think
So based on all the evidence I could find, Mary's name is probably Mary Field, and her parents are unknown.
Profile Manager Jeff, and anybody else who's interested - what do you think?