Thanks for the info. You're talking me into a trip to the area, which would always be worthwhile anyway as it's so lovely.
I rather blundered into the question of Jewish ancestry which - now I've read up on it - is a huge subject. In identifying Jewishness are we talking nationality, race, religion, observance, ethnicity, genetics? Like the Catholics of the C16 -C18th Jews would have striven often to hide, not advertise, their identities and so I wouldn't know where to start record-wise.
I have a Judith Franks (1685 - 1745) m. Kenneth Brammall (1670 - 1728) in King's Lynn. This was an important port at the time and access to immigration. Their daughter Alice married Thomas Fox from Bradwell, Derbyshire and so took the family to that location.
But I am making assumptions that names like 'Franks', 'Fox'' & etc are Jewish. Names that seem so may have become just that as Jewish people adapted their own names to fit.
My own Eyre connection is my 2 x Gt grandmother Nancy Hanson (nee Eyre) 1841 - 1888 who, with her husband Amarias Sellers left her native Manchester and sought work in Barnsley, then Murton and finally Gateshead where, at 47 her harsh life terminated with pneumonia and gangrene of the heart, a ghastly end.