I voted to close the question https://english.stackexchange.com/questions/362525/when-a-name-ends-in-z as a duplicate of Possessive form for a surname ending with "z" (Q1).
Unfortunately, that question is in turn closed as a duplicate of an earlier question Should an apostrophe be used with a z at the end of a word? (Q2).
I think it should be the other way around. Tchrist's answer to Q1 is more informative with much more detail than Q2, whose answer is actually (and unhelpfully) about "proper nouns ending in s". Q1 has the canonical canonical answer, and I think all future questions should be closed as a dupe of it, not of Q2.
Similar to how we nominated a new canonical "asking for an ordinal" question, can we please vote to re-open Q1, and when that's done, vote to close Q2 as a dupe of Q1?