Rule 4
To show plural possession, make the noun plural first. Then immediately use the apostrophe.

Examples:
two boys' hats two women's hats
two actresses' hats
two children's hats
the Changs' house
the Joneses' golf clubs
the Strauses' daughter
the Sanchezes' artwork
the Hastingses' appointment
the Leeses' books

Rule 5
Do not use an apostrophe for the plural of a name.

Examples:
We visited the Sanchezes in Los Angeles.
The Changs have two cats and a dog.

Rule 6
With a singular compound noun, show possession with 's at the end of the word.

Example:
my mother-in-law's hat

Apostrophe rules part 2