Your borther-in-law's children are your nieces and nephews. You are their uncle or aunt, as is your spouse.
Nephews and nieces
There is 2 answers your mothers brothers children or your dads sister;"s children
"Relative" refers to something considered in relation to something else, such as a family member. "Relation" refers to the way in which two or more things are connected or in a particular type of association with each other.
they were brothers !!
The brothers of your husband are your brothers-in-law.
No relation.
No, they are of no relation.
step brothers
Uncle if you are male and aunt if you are female.
Your brothers granddaughter is your grandniece.
theyre brothers
If you like. You have no blood relation.