See link below for a step by step how-to.
Yes
They keep the last name of their original parents.
You can ask a judge and he will legally change your name for about $50.
Ike's adopted last name is Broflovski, although he was born Peter Gints.
Durant is his Mother's maiden name. Pratt is his father's last name.
England. It is the name of a town, and some people adopted it as a family name.
Eleface
mangolia
He was put up for adoption and was adopted by the Jobs family therefore his last name became Jobs.
Magnolia
No. However, it is possible that a handful of Jews adopted it.
scooter