SISTER
Your cousin.
your
I will call her niece.
In the English language it does not matter whether it is your elder brother or your younger brother. It does not matter if you are talking about the child of a brother or a sister. The daughter of any brother or sister is your niece. The son of any brother or sister is your nephew.
Niece (Neese)
Any children of your parents' siblings are your cousins.
This is the way it goes: Your fathers elder brother is YOUR Uncle,his grand daugher is YOUR first cousins daughter. So this grand daughter who is your first cousins daughter would be YOUR SECOND COUSIN.
He would be your brother-in-law. To your children, he would be their Uncle.
Isabel is the younger daughter. Sam is the elder.
the same what you would feel if you were the elder brother........
In Tamil, elder brother is called "அண்ணன்" (Anna).
The cast of The Elder Brother - 1913 includes: Harry Beaumont as Bob Wade - the Younger Brother Richard Tucker as Eric Wade - the Elder Brother