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Found something here. Melegrot is the capital of the elven kingdom, and its name translates to "thousand caves." The king of this land was killed by dwarves from Nogrod. They now live in Moria:
http://ru.lotr.wikia.com/wiki/%D0%9C%D0%B5%D0%BD%D0%B5%D0%B3%D1%80%D0%BE%D1%82
http://ru.lotr.wikia.com/wiki/%D0%9D%D0%BE%D0%B3%D1%80%D0%BE%D0%B4
Only one thing confuses me. After all, a hundred hundreds is ten thousand, not a thousand, but who knows?