Clementine is a traditional name, the feminine form of Clement. The citrus fruit was named after the man who created it as a hybrid of an orange and a mandarin. (His first name was Clement.) Apple is not traditionally used as a name, though some parents like to choose ordinary words as names. I know a kid named Ocean, which I think is kind of cool.
I agree that double names, like Phillip Phillips, are ridiculous. Why do that when there are thousands of other choices? I also agree that unconventional spellings of a common name just create lifelong inconvenience for the child. Or unconventional pronunciations. For example, a girl in my high school is named Dana, but she doesn’t pronounce it Day-na, as most would assume; instead it sounds like Donna. She always had to say it was like the actress Lana Turner, with a D. I would imagine having to explain your name all the time gets really old.