Board Thread:Support Requests - Community Management/@comment-3451440-20130329233836/@comment-4674838-20130330030250

It depends what you mean by "renaming". If you mean that you renamed a page (e.g. your profile), no, that won't reattribute edits.

If you mean that you filed a request at Special:Contact for Wikia to rename your account, then yes, the tool that they use for renaming accounts will reattribute edits during the user rename process. But you can only rename an account once, and this doesn't apply to anonymous users.