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Llamedos
From Discworld & Pratchett Wiki
Llamedos is a hilly and permanently rainy country on the main continent. It is the home of druidism and druidical music and lots and lots of cold, exceptionally wet rain. Famous inhabitants include: Imp y Celyn, a.k.a. Buddy, lead singer and guitarist of The Band With Rocks In, during the Music With Rocks In fever in Ankh-Morpork (see Soul Music), and Sgt. Dai Dickins, a stalwart in the Glorious Revolution (see Night Watch.) Evangelist and explorer Llamedos Jones, reputed to have discovered the Brown Islands, was also a native.
The odd tendency of local placenames to spell strange things backwards in Morporkian does not arise from any jocular attitude on the part of the Llamedosians. They are known as a rather dour and humorless group.
The Prince of Llamedos is, historically, the courtesy title given to the eldest son and heir to the throne of Ankh-Morpork and may derive from a time when Llamedos was part of the Ankhian Empire. The current (undeclared) Prince is Carrot Ironfoundersson.
Annotation
Llamedos and its inhabitants closely resemble Wales and the Welsh.
The name Llamedos is a reference to Llareggub, the town in Under Milk Wood, the poem by Roundworld's Dylan Thomas. The trick is to read them backwards:

