Cornelius McQuade Duffy (7 March 1937 – 17 June 2013) was a Scottish footballer who played as an inside left. His most prominent spell was with Partick Thistle,^[4] and he was inducted into their 'Hall of Fame' in 2009.^[5]

Duffy began his career in the SJFA with north Glasgow team Ashfield^[6] alongside future European Cup winner Stevie Chalmers, who stated in his autobiography that he felt Duffy was the more skilled of the pair of them.^[7] Both were selected for the Scotland team at that level before stepping up to senior football.^[6]

Other than a single Scottish Football League appearance on trial for Hamilton Academical,^[8] his first senior club was East Stirlingshire,^[9] followed by five years at Partick Thistle, during which the club made a challenge for the Scottish League title in the 1962–63 season, but lost form after delays caused by a very harsh winter.^[5][6][10] In late 1964 he moved on to St Johnstone^[11] in a swap deal involving Dan McLindon,^[6] resuming a playing partnership with Gordon Whitelaw.^[12]

Duffy then immigrated to South Africa where continued to be involved in football as a player and a coach.^[6] His son, also named Neil Duffy, likewise became a footballer, growing up in South Africa and initially playing there before establishing himself in the Scottish leagues.