wallace, knight/night,pennington,wells,kunnis, Rutherford,rice,muchado,taylor,bradford. All I could think of for the moment.
The first name that came to mind was Ashton Paige.
However I really love Ashton Jade.
I like Ashton Redfern. I think it sounds good.
Ashton St. James
There are several name generating sites available. This is Books & Authors; name generating is not the purpose here.
Those are just a few off the top of my head. good luck, let me know if you pick one of these!
By your above response of Ash, it sounds like it's a girl character. Some good last names for a girl character with the first name Ashton is: Ashton Grey, Ashton Bone, Ashton Wellz, Ashton Sales, Ashton Wellington, and Ashton Cires. Ashton Redfern, sounds a little weird, no offense, just trying to help you with your question. I hope I helped and I wish you luck with your book! (: