Wayne Maurice Keown is an American professional wrestling manager, booker and retired professional wrestler, better known by the ring name Dutch Mantel (also spelled Dutch Mantell).

Keown debuted in 1972, as Wayne Cowan. He achieved fame in the regional and independent circuits, as well as World Championship Wrestling (WCW), as "Dirty" Dutch Mantel. Keown also worked with WWE as Uncle Zebekiah in the mid-1990s, and again in the 2010s as Zeb Colter. In the late 1990s, 2000s, and late-2010s, he worked as a booker for the World Wrestling Council (WWC), the International Wrestling Association, Total Nonstop Action Wrestling (TNA) and Extreme Championship Wrestling (ECW) as well as Championship Wrestling from Florida.