hmm very interesting this one , would like to see photo of upper chewing surface. Jaw section looks like it may be partially mineralised , is it quite heavy ? also what part of the country do you live in ?
sorry I cant be of much help at the moment , the teeth are quite well worn and you need someone with more Knowledge than I have, but a picture of the chewing surface would be very helpful
On further looking maybe Pig/wildboar but im not sure ? will leave this to the experts