Tyack

Tyack or Tyacke is a Cornish surname. It is an ancient surname and the Tyacks were landowners at an early period. It is thought to be derived from a Celtic word for ploughman. William Tyack was escheator of the Leeward Islands in the reign of James II. The Tyackes of St Breock bore the arms: ''Arg. a fesse (or a chevron) between three bears' heads couped Sa''.

Other bearers of the name:
 * Dave Tyack, German musician
 * David Tyack, American academic, Professor of Education
 * Major General David Tyacke, British Army officer
 * Jim Tyack, baseball player
 * Les Tyack, Australian politician
 * Ryan Tyack, Australian archer
 * Sarah Tyacke, British historian of cartography