Evidence needed to support Mary Bloyd as daughter of Zachariah Mackubin & Sarah McCubbin
From the notes of Russell Perkins
https://www.findagrave.com/memorial/204873226/mary-bloyd
Disputed identity
I have read, although I have not found the proof, that he married a woman named Mary in Maryland--somewhere around Chesapeake Bay. The bill of sale for their property gives her first name as "Mathew", also Martha, but everywhere else she is called Mary. I think this is a case of a nickname. Most of the women in this family go by their nickname. There is some debate about her last name; some sources say it might be McCubbins, but I doubt it. I think it may be Riggen/Riggan/Riggens. One McCubbins source descended from John/Mary Bloyd says this, and it fits with the fact that Riggins was given to a grandson as a middle name. There were several Riggen families in the Chesapeake area prior to the Rev. War, so it's possible. He purchased land from James McCubbin in Rockingham Co, NC in 1792, where he and Mary raised their family.
