The Edelweiss was a Misthalanian vessel used by the past duke of Lumbridge in the mid-Fifth Age. According to an issue of Postbag from the Hedge, a young Duke Horacio and his father took the Edelweiss to a number of Southern Sea islands in Year 129.
During the voyage, the crew is known to have docked in Crandor and Entrana, although they were hindered after two monks onboard developed Hangsman's Plague. The ship's only known crew member was Brugsen, the first mate. What has since become of the ship is unknown.