American (and, I suppose, Canadian) place names are often derived from words in Indian (aka Native American) languages, individuals or tribal groups. For example, Seattle, Washington is supposedly named after Chief Sealth, and I once lived in Steilacoom (a tribe), also in Washington. Given that there are (or once were) hundreds of tribes in North America, that provides some options that aren't available in the UK. We also, especially in the Southwest, have a lot of place names that are Spanish. I live in Albuquerque (which should be spelled Alburquerque), on Sprenger Drive, near the intersection of Paseo del Norte and Wyoming. How's that for a mixture...and my neighborhood has a name but I don't have a clue what it is!

And, IanB, if you really don't know what a duplex is, think of it as the residential equivalent of a siamese twin: 2 houses with a common wall, generally laid out as mirror images of each other. I've lived in a couple, and their habitability is directly related to the thickness of the wall.