The Dunes of Talmouth were a geographical feature.

Neelix's sister Alixia once mounted an expedition to the Dunes of Talmouth. One of Neelix's most prized possessions was a necklace she made during that trip. (VOY: "Mortal Coil")

The Dunes of Talmouth were named by Bryan Fuller. He invented the name "Talmouth" after the honorific Hebrew title "Talmid". (Information from Larry Nemecek)
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