At Consonants combined with an "h" and double consonants, I have been asking where do "valley" and "valle" come from, and no one has been replying.
First of all, you've tried to ping one of the users who wrote an answer with a comment on your question, but it doesn't work that way; see How do comment @replies work?. They did get a notification from this comment under their answer.
Second, please remember that we're volunteers here; we're not required to answer questions. The user has been online after the notification (you can see that in their profile) but they might have had little time.