Tan, nox? Divvy for a fool or stupid person is used as 'div' in the South; 'he's a bit of a div'; but what does 'tan' come from ? But the other words you list, save for 'kith' , are in general use in the South, maybe everywhere, and admittedly not by the whole population in regular vocabulary, but understood .
Thinking about it, some words which have lived in obscurity do get revived for general use: 'chav' is one, apparently being Romany for 'child', and once current in Kent, and 'bird' for a young woman may be one, being recorded with that meaning a long time ago and revived in the 1960s .
And some words appear like comets, coming into view for a short while, in linguistic terms, and then disappearing. My mother was surely not alone in using 'parney' for rain ("it's going to parney"), a word which seems to be a word for 'water' in an Indian language and which must have appeared in English during the Raj and then disappeared with the end of it. Doolally for 'mad', also with an Indian connection, has survived better, but is rare nowadays.