I went to college with an individual named Craig Plunges. He was an English major, interested especially in contemporary poetry, and quite tall.

I bring this individual to your attention because of the remarkble fact that his name is both a proper noun and a full sentence. What if your name were "Bobby Goes to the Store"? Or "It Rains"? In his natural state he's both grammatically correct and ambiguous -- either a name or a sentence; however, once you try to add him to a sentence, you have to decide which is which. Either, "Craig Plunges is coming over" (name) or "Craig plunges for a living" (sentence).

I once worked briefly with someone whose full name, though not spelled this way, was pronounced "On the Loo," but that's just a prepositional phrase and so not at all in the same league.

My own last name is an adverbial phrase, though I assume by accident. "Schön" in German means pretty or beautiful, and if you drop the umlaut in English, you're supposed to add an "e" -- schoen. But "schon" means "already," so my last name -- Schonberg -- now means "already mountain," which doesn't mean much, as far as I can tell. Not only am I far from sentencehood, but the pieces of name I do have can't even be cobbled into recognizable phrases, a sorry state of affairs. Perhaps if my middle name were "is"...