Alexander Magruder is said by many sources to have been married to Margaret Braithwaite, mother of their son Samuel and daughter of William. The most recent professional genealogists, however, are questioning whether Margaret Braithwaite ever existed.
William is said by some much used sources to have been an early member of the Maryland Assembly and even at one point acting Governor. I have not found him, however, in the Maryland State Archives. William appears on various internet sites such as geni. The best documentation I found for him was on a genealogy.com site -- which sourced him back to an ancestry.com database.
Because Margaret is an integral part of so many peoples' believed ancestry, she and her father's existence -- or non-existence -- need to be thoroughly documented. So my question -- and request for help -- is for any information that could expand our knowledge of William and Margaret -- either who they really were, or how the beliefs about them came into existence!