Your daughter and your nephew are first cousins to each other. Your daughter and your nephew's son are first cousins, once removed, to each other.
first cousins
Second cousins once removed.
The sons of your son-in-law's siblings are his nephews. You are not related to them.However, your son-in-law is married to your daughter. The sons of her siblings are also your son-in-law's nephews. They are your grandsons.
It does not appear that Thomas Jefferson had any nieces or nephews. He had a daughter, a son in law and two grandsons. He also had an aunt and a first cousin.
Amanda Perez has no children she has many nieces and nephews.
Yes. Her sister, Margaret, had a son, Viscount Linley, and a daughter, Lady Sarah Chatto.
your nephews
Your daughter and your nephew are first cousins. His daughter is your daughter's first cousin, once removed.
Great nephew
3rd cousin
Yes, the brother's children would be nieces and nephews of the great-great-grandmother; aka his sister. Great-great grandmother's daughter would be a 1st cousin to the brother's children. She would be the niece of the brother. The great-great grandmother's daughter's daughter would be a 1st cousin once removed in relation to the nieces & nephews. (# of removed depends on generations separating the relatives.) She would be a grand-niece to the brother. The great-great-grandmother's daughter's daughter's son would be a 1st cousin twice removed to the brother's children (nieces and nephews of the gggma) and a great-grand nephew to the brother. The person at this link does an excellent job of explaining this. http://www.ourancestry.com/cousins.html
what would my sister's son's daughter be to me? Your sisters son is of course your nephew,You are his Aunt... Your Nephews daughter would be your great-neice,you would be her great-Aunt.
Your daughter is you great nephews great cousin if u live in Australia ,USA ,UK