Your uncle's daughter is your first cousin. The English language does not have a special term for the spouse of a cousin. That spouse is not considered to be related to you.
Nieces.
Your grand daughter's husband is your grandson-in-law.
Your aunts and uncles are the sisters and brothers of your parents. So they are "blood related." But you also call the husband of your mother's sister your uncle, and he is not "blood related." So aunts and uncles are not always really related to you.
aunts, cousins, daughters, sons, and friend.
would it be a brother in law? not sure about this one! Is it your husband/wifes daughters brother?
would it be a brother in law? not sure about this one! Is it your husband/wifes daughters brother?
Your daughters husband is you son-in-law.
I call them my uncles
Chachi
Bob No bog
Your cousin in law
Uncle