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.[1] William Tyack was escheator of the Leeward Islands in the reign of James II.[2][3] The Tyackes of St Breock bore the arms: Arg. a fesse (or a chevron) between three bears' heads couped Sa.[4]
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
 
Footnotes
- ^ Tyacke; forebears.co.uk; citing Patronymica Britannica, written: 1838-1860 by Mark Antony Lower
 - ^ "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
 - ^ Pascoe, W. H. (1979) A Cornish Armory. Padstow: Lodenek Press; p. 117