The credits of any episode where her parents appeared list their last name as "Green" and on the Warner Bros. "Friends" Official Website the biography on Jennifer Aniston states her character's name as Rachel Green.
The credits of any episode where her parents appeared list their last name as "Green" and on the Warner Bros. Emma's birthday cake box has "Green" written on the side. On the "Friends" Official Website, the biography on Jennifer Aniston states her character's name as Rachel Green.