Sephardic Jews DNA results

[Rodoorn]

I don't trust such estimates too much. The most trustworthy results come from matches which share solid segments with a person. Like if you have a couple of Sephardic matches on a specific area of a chromosome, that would be better evidence than ethnicity estimates of some sort, which might be skewed by bad fitting references or very old admixture events.
If we are talking about 1500 and later, there is a chance, if the admixture is real, that you still have some matches in that direction. To check that seems to be the better way to go, IMHO.

As said two matches on my heritage Riverman with two Israeli.

Take in account that the Y-DNA is exclusive Levantine and E-V22 is core semitic.

In we must take in account that this Y-DNA suvived the reconsquista, went 'undercover' in Frisians catholics and when some were part of the Sepharadim the Holocaust did probably the rest.

We are talking about (end) 17th century, 7 generations ago, and the Jews shared at that time a worship house in Leeuwarden next to my ancestors lived (and participated).

Two is not a lot, though. But given that the ancestor might have lived in the 16th century, its possible he left no autosomal heritage in your family at all. Or you might have autosomal Sephardic ancestry, but not from your direct paternal ancestor. Many alternative options, I'd say.
Without a more recent paternal lineage match, it remains speculative.

I already stated it's not a lot, but that is no surprise. And it's seven generations Riverman (end) 17th century. Then was the influx. So quit real it has left a trace (about 1%)..

My father on the whole autosomal level (the rest was on chromsome level):

Davis about the Erfurt paper:

"The spreadsheet also shows that the so called Middle Eastern cluster is modal (that is, it peaks in) the Druze." 

Question:

When there is a singleton Conversos forefather 7 generations assuming that each generation is roughly 50 years apart. ago how much of the 100% Conversos ancestry is left in the autsomal of the current generation? And on chromosome level?

Chat GPT: 

Summary
Autosomal DNA: Approximately 0.78% (or 1/128) of the autosomal DNA of an individual 7 generations later will come from a single Conversos forefather.

Chromosome Level: This DNA will be distributed across the chromosomes in very small segments, due to the recombination events that occur in each generation.

These calculations assume ideal random recombination and independent assortment, which gives a statistical average. Actual inheritance can vary due to the randomness of genetic recombination.