Hi friends!
Here are some more tips on how to use the possessive case. This is the second part of the blog which I posted yesterday. You may find today's lesson a little complicated and uninteresting as it deals with a few grammatical terms. However I am compelled to post this as many of the visitors, mostly English teachers, requested me to do so.....

(IV) If a French name ends in a silent 's' or 'x', we must add -'s to create the possessive case. And the -'s part should be pronounced as 'z'.
e.g.
Dmas's book. (pronunciation /dyoomaz/)
Cremieux's (pronunciation /krenyu)

(V) Foreign syllabic names which are not stressed on the last or second last syllable can either take the apostrophe alone or -'s form.
e.g.
Barnabas' or Barnabas's
Nicholas' or Nicholas's