Name ending with 's'

You just omit the final 's' i.e. you write just the apostrophe (') like in Jones'

Hello, maverick

The book said Jones's friends and Thomas's diary but Adams' book. I thought I can just ignore the apostrophy 's' too. Pourquoi?

Hello, Pastel!

The family names ending in -s take 's in the possessive case like all the others. "Mrs Jones's house", etc...(they're always accompanied by Mr, Mrs, Ms or Miss, or by the christian name). However, in the case of famous names, the 's can be omitted: "C. Dickens' novels", "Jesus' life", etc...

William is also a family name. And the book said

1-Mr. Williams' house

2-Mr. Adams' freinds

3-Mr. Hopkins' reply

but then

1-Mr. James's help

2-Mr. Jones's mistake

3-Mr. Thomas's diary

It says that for one syllable name, if adding 's' to its end doesn't make pronunciation more difficult, then apply apostrophy 's'. If the name

Well, "Thomas" is 2 syllables...

I don't know, I just checked the rule in my book too. But it must be older than yours.

Bonne nuit, Pastel! Mais attention: pas de point après "Mr" - ni Mrs ou Ms non plus, d'ailleurs! -

Both ways are okay, but consistency is key.

These all seem fine to me:

1-Mr. Williams' house (of Mr Williams)

2-Mr. Adams' friends (of Mr Adams)

3-Mr. Hopkins' reply (of Mr Hopkins)

1-Mr. James's help (of Mr James)

2-Mr. Jones's mistake (of Mr Jones)

3-Mr. Thomas's diary (of Mr Thomas)

Maybe we say Mr Thomas's because we say Thomas's.

Or perhaps it's related to differen

PieanneBonne nuit, Pastel! Mais attention: pas de point après "Mr" - ni Mrs ou Ms non plus, d'ailleurs! -

Sorry, Pastel... "Mr" is English, and never takes a "." because the "r" is the last letter of the word "mister". Same goes with

http://www.google.com/search?hl=en&lr=lang_en&q=%22Mr.%22

"Mr" is English, and never takes a "."

Don't you think Mr. Smith sometimes wears a "." when he's shooting Mrs. Smith?