What is the proper way to make a word ending in “z” possessive (singular)? For example, the name…Heinz? For example, the name…Heinz? Heinz’s coat or Heinz’ coat?
Megan M., Fort Worth, TX
If a professor has the last name of Cortes and he writes, Professor Cortes’ office hours are…is this the correct use of possessive for a name noun or can the punctuation be both before and after the “s”?
Lynn S., Fort Collins, CO
Answer: In both case, logic rules. Punctuate to match how you would read the phrase orally, and you will come up with Heinz’s ketchup or Cortes’s office hours. Be consistent and you will eliminate questions on this matter – despite the fact that some prefer to omit the apostrophe s.
Example from The Wall Street Journal: Mr. Rogers’s Neighborhood: