RootsChat.Com

Thanks Biggles50. Very interesting advice.

Would anybody recommend another site that’s good for ethnicity.? Just to double check my results.
Luckily I uploaded my Ancestry DNA to MyHeritage a while ago. So I have both results.

I am very grateful for your reply and will spend some time studying your suggestion. Thank you very much.

Hoping somebody out there can put me right about this, this forum has always come to my aid when I needed it in the past. So, here goes.... my DNA results some years ago surprised me with a 26% Jewish ethnicity. I have a fairly extensive tree, been researching for over twenty years, and know that I have no obvious Jewish ancestors ( although people always commented on how Jewish or Italian my Mum looked).
I am wondering if my grandfather may not have been my grandfather. I know my Nan was pregnant when she married, in 1927,  but am considering if he may not have been the father, even though this seems unlikely.
When I checked my DNA matches on my maternal side with a common ancestor, they are all on my Nans side, and there are none from my grandfather's. I checked 40. I have a pretty comprehensive tree on Ancestry for both sides. 
Do you think this has any significance?
Added to this, the best DNA match on myheritage that I have at 412.6 cM is someone with a similar ethnicity and a grandmother who, family story has, had an affair with a Jewish furniture store owner in 1930 Liverpool. She even looks quite like my Mum, who would have been her half-sister if this scenario is true.
Anecdotes aside, any help would be appreciated. Does the fact I have no matches with anybody that shares ancestors with my grandfather have any significance? thanks.