80's names like
Tiffany,
Brittany,
Justin, and
Chad and 50's names like
Susan,
Linda,
Larry, and
Randy. Nick-name-y names like
Bob,
Sam,
Peggy, and
Molly.
Basically any name that is specifically attached to a decade or that passed through a short phase. Europeans tend to be more grounded in tradition in naming, choosing names with personal or historic significance. Americans, on the other hand, are more aesthetic and thus the "American" naming style follows what "looks" or "sounds" good at that time. It is influenced by fads and momentary trends.