I'm working on a story in third person limited POV with two different viewpoint characters. Each character has a different relationship with other characters, and therefore might refer to the same person with a different name. For example, character A might refer to "Uncle Fred", but character B calls the same man "Skipper" because of a working relationship. I understand from POV rules that each character should be consistent in what name they use so as not to confuse the reader. Internally, character A should always refer to "Uncle Fred" rather than "Skipper" since that's how A thinks about the man.
So, questions:
1) Any suggestions on techniques to make sure the reader understands that "Uncle Fred" and "Skipper" are the same person?
2) What if I want to introduce a different POV? For example, setting a scene using third person omniscient then shifting into one of the viewpoint character's POV? What name should be used for Fred during the "omniscient" section? The name the about-to-be viewpoint character would use?
So, questions:
1) Any suggestions on techniques to make sure the reader understands that "Uncle Fred" and "Skipper" are the same person?
2) What if I want to introduce a different POV? For example, setting a scene using third person omniscient then shifting into one of the viewpoint character's POV? What name should be used for Fred during the "omniscient" section? The name the about-to-be viewpoint character would use?