Private User
Ninian Magruder's mother is documented as Sarah Beall, not Sarah Mills. I'm in the process of adding documentation for his ancestry to their Geni profiies. I was going to go ahead and disconnect him as a son of Sarah Mills and connect him as a son of Sarah Beall, but the fields are locked and I can't make the change.
From Sarah Beall's Find-a-Grave page:
https://www.findagrave.com/memorial/104554821/sarah-magruder
Sarah married Col. Samuel M. Magruder in 1686 in Prince Georges County, MD. Col. Samuel Magruder was a High Justice, Captain of Militia, Member of the House of Burgesses for Maryland, etc. You can find out more about this family from the book "Colonial Families of the United States" page 349. Sarah brought 5 young children into this marriage, then she and Col. Samuel Magruder had the following 9 children: Samuel, Ninian, James, William, Alexander, Verlinda, Mary, Elinor and Nathaniel Magruder
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Ninian Magruder was named after his mother Sarah Beall's father:
Colonel Ninian Beall
I have quite a bit of documentation to attach to the various profiles, a work in progress.