Your nephew.
You are an uncle, or an aunt, to your sister's son, and he is your nephew.
Your son and your sister's daughter are first cousins. Your son and your sister's daughter's son (your sister's grandson) are first cousins, once removed, to each other.
Your sister-in-law's daughter's daughter (your sister-in-law's granddaughter) is your great niece and you are her great aunt (if you are a woman) or great uncle (if you are a man)
You should write daughter's if you are talking about one daughter, e.g. "it is my daughter's birthday tomorrow".You should write daughters' if you are talking about more than one daughter at the same time, e.g. "this is our daughters' bedroom, which they share".
Yes and no.Yes if the word is possessive, and could be replaced by a phrase with "of". If one daughter is meant, the apostrophe goes before the 's':"What is your daughter's name?" = "What is the name of your daughter?"If more than one daughter is meant, the apostrophe is after the 's':"What are your daughters' names?" = "What are the names of your daughters?"Otherwise, no apostrophe:My daughters are here.He gave gifts to my daughters.
the daughter's cousin
daughters in law (just add a "s" to daughter)Daughters in law is the answer. Some people think it is daughters in laws but it is not.Hope this has helped.Nessa xx
he has a daughter called Hailie and a daughter called jemz I don't know any other of his daughters
Granddaughter
It is daughters.
IF you
First cousins, twice removed. Aunts daughter is your cousin. Aunts daughters daughter is cousin once removed Aunts daughters daughters daughter is cousin twice removed.
Daughters is a noun. It's the plural form of daughter.
Daughter's means belonging to your one daughter. (possessive singular) Daughters means you're talking about more than one daughter. (plural) If you want to show something belongs to more than one daughter, you use daughters'. (possessive plural)
The plural form of the noun daughter-in-law is daughters-in-law.The plural possessive form is daughters-in-law's.Example: Both of my daughters-in-laws degrees are in education.