The possessive form for the plural noun brothers-in-law is brothers-in-law's.
Example: I had the work done at my brothers-in-law's body shop.
The possessive form of the plural noun attorneys-at-law is attorneys-at-law's .Example: All attorneys-at-law's credentials are subject to a background investigation.
The possessive form of the singular noun son-in-law is son-in-law's.Example: My son-in-law's name is Harry.
The form "father's in law" is incorrect.The possessive form of the singular, compound noun father in law is father in law's.Example: We completed the project with my father in law's help.
The possessive form of the singular noun attorney-at-law is attorney-at-law's.Example: This attorney-at-law's experience includes representing defendants in criminal cases.
The possessive form of the compound noun sister-in-law is sister-in-law's.Example: My sister-in-law's birthday is the same day as mine.
The plural form is brothers-in-law.The plural possessive is brothers-in-law's.Example: Both of my brothers-in-law's careers are going very well.
The plural form of the compound noun brother-in-law is brothers-in-law.The plural possessive form is brothers-in-law's.example: Both of my brothers-in-laws birthdays are on the same day.
The possessive form of the plural noun brothers is brothers'.Example: The brothers' business is really doing well.
The possessive form of the plural noun brothers is brothers'.Example: My brothers' names are Jeff and Jack.
The plural form of the noun brother is brothers.The plural possessive form is brothers'.Example: The brothers' business is really doing well.
The plural possessive form is fathers-in-law's.
The three brothers' dogs.
The possessive form of the plural noun sons-in-law is sons-in-law's.example: Both of my sons-in-law's birthdays are on the same day.
The possessive form for her sister-in-law is her sister-in-law's.Example: She borrowed her sister-in-law's car.
The possessive form of the noun sister-in-law is sister-in-law's.Example: I borrowed my sister-in-law's car.
The possessive form for her sister-in-law is her sister-in-law's.Example: She borrowed her sister-in-law's car.
The plural possessive form is mothers-in-law's.