Isn't it fun, tho? (grin)
Yeh... as a preschooler, I wound up in VA as a construction camp brat. Portsmouth. Norfolk==>"naw fuk" as I recall. Although I was too young to comprehend the family tragedy, Mom suffered a catastrophic miscarriage while we were there; step-dad hired a black 'nanny' to look after us kids and tend Mom while she recovered. I was responsible for a family 'legend', it seems. "Mammy" took me shopping with her; we rode one of the old post-war buses. I stood in the seat, stared at a man in the seat behind us; turned to Mammy and voiced, "Mammy, he sure is black, ain't he!" I was still hearing about how Mammy had to hustle me off the bus at the next stop, years later.
Odd, but in my years of living in Boy-zee, I seldom heard the sibilant; it was usually the buzzy zee sound. As for Dubois, usually mangled by Utah-Idaho Mormon speech, it came out du-boyz, accent on the boyz.
Another story about Tooele, Utah. I was attending US Navy Electronics "A" school on Treasure Island in the early 60's. A bunch of us had gotten our Ham Radio licenses, and were privileged to have our own "duty watch" in the K6NCG (kay six navy coffee grounds) club station. I was operating a single-sideband transceiver one evening and made contact with a Utah ham. After several attempts I still couldn't understand his QTH (location). Finally, after several attempts I was able to write down--as he slowly, phonetically, enunciated each letter: T--O--O--E--L--E. I stared at that and still couldn't believe it! How the HELL does that come out as "too-illa," or "twilla!" It was embarrassing. SSB speech is not always easy to understand, anyway, as it usually as a Donald Duck edge to it, unless perfectly tuned. That's one I never, ever forgot.
At the mouth of the Methow (Met-how) River where it meets the Columbia is a rebuilt town (the original got drowned in the reservoir behind a dam) called Pateros. One day a tourist asked stepdad, "How's that pronounced?" Step-dad, a former iron worker, high rigger, and lately a logger, grinned at the flat-lander and said, "Simple. Pat-her-ass!"