Board Thread:General Discussion/@comment-24589671-20140813033237/@comment-2153169-20140815140215

GothicNarcissus wrote: I think he's credited as Will Scarlet rather than as the Knave of Hearts because that's a title he only had in Wonderland. People in the Enchanted Forest (and thus now in Storybrooke) probably just knew him as Will.

That's probably the reason, yeah :)