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: Footnotes. Logan TYACK