For those who doubt that Stoney is indeed a real(though rare) name I searched very hard to find baby search engines to find it. This link came up with something:
link Also I recommend trying this site
babynamewizard, it didn't work on the school comp because they suck when it comes to javascript, but I think it maybe be identical to the site I used to find out that it was a name. I'm not making this up, damn it!
I'm still looking for better name search sites to confirm. Just saying, if a person's name can be Stone, why not stoney? It makes sense really.