Correct punctuation with two nouns? [duplicate]
Solution 1:
Uncle and Jack are two nouns in apposition.
In a non-restrictive appositive, the second element parenthetically modifies the first without changing its scope and it is not crucial to the meaning of the sentence. In a restrictive appositive, the second element limits or clarifies the foregoing one in some crucial way. For example in the phrase "my friend Alice", "Alice" specifies to which friend the speaker is referring and is therefore restrictive.
Restrictive appositives like “my friend Alice” and “my uncle Jack” are not set off with commas.