What is the possessive form of s?

The possessive forms for proper nouns follow the same rules as common nouns:

Possessives are formed by adding an apostrophe -s ('s) to the end of the Word, or just an apostrophe (') to then end of plural nouns that already end with -s. Examples:

Mr. Brown's house, or plural: The Browns' house is number twelve.

Ms. Glass's house, or plural: The Glasses' house is number ten.

Mr. Cruz's house, or plural: The Cruzes' house is number eight.