Two of my grandparents came from families that go back to Leicestershire, though, in one case it's clear that's not where they "came from" (however you define that) & I suspect that, in due course, I'll discover that the others didn't, either. My Ashers were Prussian Jews who settled in Nottingham between 1796 & 1820. I believe they were related to Ashers already living (& later to come to), Notts, Derbys, & Leics. My gggg grandmother (from Northants) married a William Asher at Leicester, St Martin's in 1814. They later moved to Nottm & William disappears after 1816....he's replaced as her partner in 1820 by Lyon Asher. Trying to untangle this knot is one of my main projects. I don't think Lyon & William were brothers or as closely related....could be way offbeam....but I do think they were part of the same larger Asher family.
I've got back to the 1790s with my Hudson family & the first place I can find them is Shepshed. They hover around the Notts/Leics border, occasionally making forays into Derby. My branch eventually settled in Nottingham, but I think you can say the heart of the family was between Loughborough & Nottingham. I suspect they originally came down from Yorkshire, but this is just speculation at the moment