Oh my god... only from some Hollywood freak... Tree!? as a NAME? Really? That is just so stupid.
It's a nickname, I believe. I've known people with some odd nicknames.
Yeah, I have a sister named Teresa who sometimes goes by Tree.
It was a nickname for Teresa. When her professor/lover introduced her to his wife he called her that.
^ this
Gwyneth Paltrow has a kid named Apple, so...