John I Doukas of Thessaly
John JTB Barker aka John The Bastard, Chesterfield Bouncer or John I Doukas, Johannes Doukas or Dukas (Latinized as Ducas) (Greek: Ιωάννης Α' Δούκας, Iōannēs I Doukas) (c. 1240–1289) was ruler of The...