David Craig Mackay (14 November 1934 – 2 March 2015) was a Scottish football player and manager. Mackay was best known for a highly successful playing career with Heart of Midlothian, the double-winning Tottenham Hotspur side of 1961 and winning the league with Derby County as a manager. He also represented Scotland 22 times and was selected for their 1958 FIFA World Cup squad.
https://en.wikipedia.org/wiki/Dave_Mackay