What is the correct grammar to use in a phrase like "Chris' and Claire's email addresses"? Is it correct to add the apostrophe to each owner in the list?
marked as duplicate by Matt Эллен, Mehper C. Palavuzlar, Alenanno, simchona♦, waiwai933♦ Sep 29 '11 at 3:09
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I assume the fact that OP's example specifies addresses in the plural means that Chris and Claire have separate email addresses.
Thus the phrase is actually a contraction of "Chris' email address and Claire's email address", so both apostrophes are valid (I personally would write Chris's, but opinions may differ on that).