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.Tyacke; forebears.co.uk; citing Patronymica Britannica, written: 1838-1860 by Mark Antony Lower William Tyack was escheator of the Leeward Islands in the reign of James II."Lists of Emigrants to America 1600-1700: The Original Lists of Persons of Quality 1600-1700. Our Early Emigrant Ancestors", by John Camden Hotten.Tyacke; forebears.co.uk; citing Homes of Family Names in Great Britain (1890) by Henry Brougham Guppy The Tyackes of St Breock bore the arms: Arg. a fesse (or a chevron) between three bears' heads couped Sa.Pascoe, W. H. (1979) A Cornish Armory. Padstow: Lodenek Press; p. 117
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
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