Short phrases and single words are not eligible for copyright protection. The word "Banksy" is trademarked for use on clothing by Pest Control Office LLC of Harrow, which asserts it has Banksy's permission to have registered it.
Replicating a signature is less a copyright issue and more a fraud issue.
Nobody owns the copyright of a single word. Perhaps you mean trademark.
the coca cola company owns the copyright
A minor owns the copyright on any works they create.
Universal.
Word Music.
Rankin/Bass.
Rondor Music.
Paramount.
There are 24 different copyright-protected items by that name.
The phrase "copyright obtained" doesn't give any indication of who copyright might be assigned to.