It looks like Giles Brent, Lt. Governor of Maryland & Mary Brent were not the parents of Katherine Marsham There seem to be flaws in the DNA study done in 2014.
Disputed Origins
A full discussion can be found at The Legend of Katherine Brent Marsham, < link>, which traces the legend of "Katherine Brent's" existence for almost a hundred years. Katherine is said to have married Richard Marsham. The preponderance of evidence suggests that Richard Marsham's wife was actually Katherine Fisher.
https://dna-explained.com/2014/03/04/daughters-of-princess-mary-kit...
