"They are moreover, along with the pronouns thee, thou, &c, still dialectically current in parts of Northern England."

But only, I'm afraid, in a degenerate form, at least in N Derbyshire. "Thou," "thee," "thy" &c are all rendered as "tha," and "wast" and "wert" are never heard.

I was walking my well-behaved dog off-lead on Christmas Day a few years ago and she was beset by the less well-behaved on-lead dog of a passer-by who threw the blame on me for not having my dog on the lead. "Tha'rs chuffin' barmy," said he (the first word(s) rhyming with wires).