It's brothers-in-law.
No. Definitely not. That would mean the cars of my brothers in laws. You mean the cars of your brothers in law. Try rewriting the sentence so it says the cars of my brothers in law. If you can't, you can try brothers in law's cars, which would mean cars of my brothers in law, but it's still not quite right.
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.
They are Anu's brothers in law.
Both of Lin's brothers-in-law work at the Observatory.
The brothers of your spouse are your brothers-in-law. Also, the husbands of your sisters are your brothers-in-law.
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.
Your mother's brother is your uncle. Your father is his brother-in-law but he could also have other brothers-in-law. These would be men married to his other sisters, or the brothers of his wife. If they are men who married his other sisters, they are your uncles. If they are brothers of his wife, they are not related to you.
Your sister-in-laws are your sisters by law after marriage. They are either your spouse's sisters, or the wives of your brothers. Their relatives are not related to you, although some of them will be related to your children.
The Brothers-in-Law was created in 1963.
Brothers in Law - novel - was created in 1955.
Your wife's brother-in-law is either your brother or the husband of her sister. In the first case, her brother-in-law's brother is you or one of your other brothers. In the second case, her brother-in-law's brother is not related to you.
law is just one law but laws is two or more laws.