My name is none!

This guy looks like a big dog in a low-rider body – maybe Basset Hound/Terrier?? He’s very much an adult, but doesn’t have a lot of gray. He does not appear to have been altered, but does have a notch in his ear, whatever that might mean. He is reserved and observant – very serious fellow that will give tail wags when approached for petting. He has not met dogs face to face - through the fence, he is curious but doesn’t seem bothered by them. He politely takes treats from my hand. He likes space after food is put in his bowl – low growl but lunging, snapping, etc. Once I take a few steps back, he is fine. He is not shy about telling me how he feels - howling and barking off an on, but I probably would too, if I was in his situation.