Tah-won-ne-ahs or Thaonawyuthe (born between 1737 and 1760, died 1859), known in English as either Governor Blacksnake or Chainbreaker, was a Seneca war chief, who, along with other Iroquois leaders (most notably Joseph Brant), fought on the side of the British during the American Revolutionary War from 1777 to 1783, most notably at the Battle of Oriskany. In later life, his political influence waned, as younger men of the Seneca assumed control.