Barry Waddle was the identity of a male Human merchant in the 24th century.
This identity was created and assumed by Arne Darvin following his expulsion from Klingon Intelligence in 2268. The Klingon, surgically altered to look Human, Barry Waddle was a merchant dealing mainly in gemstones, kevas, and trillium. Under the alias of Waddle, Darvin was able to gain passage on the USS Defiant in 2373. (DS9: "Trials and Tribble-ations")