By definition, the author of a creative work owns the copyright of that work until it has been legally transferred to others. As a general rule, wiki only acquires a license of the rights, not the ownership. The original author would retain the right to (a) withdraw any license as permitted and (b) enforce any rights not licensed or effectively transferred.
The photographer owns the copyright of any photograph unless there is a written and signed agreement with a client that states otherwise. If the photographer is an employee of someone else and being paid for his employment, then the employer is legally the "author" and owns the copyright, under US law. It is quite possible, and often the case, that a person may own the only copy of a photograph but someone else owns the entire copyright but no copies.
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.
"Wiki" is a Hawaiian word meaning "fast." Individual words cannot be protected by copyright.
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.