my favorites from Texas:

Buda -> "byou-duh" (byou as in beautiful) but NEVER "BooDah". Occasionally you'll hear "buttah", but I'm sure those people are trolling

Bourne: Bernie

Bexar: Bear (Should be beHar, as in Harm, just like Texas is actually TeJas like the Ha in Hans of the Ja in Jalapeño)

D’Hanis: DaHennies, like "da pennies"

Weirdly most of the German places names are pronounced correctly, probably because they were founded by Germans who produced their names correctly for long enough that it stuck.