In another cinderilla story what was Mary santiago's fullname befor she was adopted?

Selena Gomez played mary santiago in another cinderella story. Her adopted mother's last name is blatt so mary didn't change her name when she was adopted nor did dominique change her last name. this could be due to her mother's wish that the name santiago be carried on or the fact that dominique, who hated mary and her mother, didnt want mary to have the last name blatt.