I really don't know about it. All my family members had regular Hungarian surnames like Turi, Kovács, etc.
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You can run this one also with MH raw data: https://cladefinder.yseq.net/
It gave me more specific clade than Morley´s predictor.
Edit: Not related with the text of your post, simply it was your last post...
Let's say that average interval of each 'generation' in that person's case is 25 years.
Let black person be born in 1800 and has a child with a white person in 1825. That child would be 50% black. His descendant in 1850 would be born and would be 25% black. In 1875 would be 12.5%. In 1900 would be 6.25%. In 1925 would be 3.125%. In 1950 would be 1.5625% black. In 1975 the parent of the person Ford mentioned would be born and would be 0.78125% black. In 2000 that person would be born and would be 0.39% black or 1/256.
Maybe I missed something idk.
We don't know many things. Maybe the person in question Ford mentioned is in his or hers 80s and not 20s, maybe the average interval in his or hers case is not 25 years, but 35 years. Maybe it is even lower than 25 years, we can't know. Maybe years in question are actually 180 years and not 200, but yes that person could be 3% or even more black, but could be below 1%. The point is also that genes could be 'washed' away pretty quickly.