Board Thread:Administrative Requests/@comment-24573226-20160522025838/@comment-26397825-20160522031031

..I cannot tell if you actually followed the link. Let me past the relevant section here anyway.

Proper Nouns (Names)

We very often use possessive 's with names: When a name ends in s, we usually treat it like any other singular noun, and add 's: But it is possible (especially with older, classical names) to just add the apostrophe ': The wiki has decided to use the latter example when referring to Weiss's father.
 * This is Mary's car.
 * Where is Ram's telephone?
 * Who took Anthony's pen?
 * I like Tara's hair.
 * This is Charles's chair.
 * Who was Jesus' father?