Minnesota/South
Dakota: Scandivian, OLd
German names are all the rage, with a mix of nature type names.
Rest of the Midwest is a toss up. It is a very diverse region so you are going to see the typical tryndee names, to the traditional Gaelic, Slavic, Italian and Hispanic names, and the classic English names. I would say it is the same in the West Coast. It all depends on the particular state and city.