There are 27,880 with the Cox surname listed at WikiTree and 963 with the Stocker surname.
To look into either surname or any surname, click on the Find menu at the top right of the WikiTree page. Follow the menu down to Surnames and enter the surname that you are interested in.
Don't be reluctant to ask questions.
Surnamedb.com has information on close to 50,000 surnames which includes Cox as well as Stocker. It's also a free site as is familysearch.org