Sir Conrad Marshall John Fisher Swan KCVO FSA (born 13 May 1924) was a retired long-serving officer of arms at the College of Arms in London. Having been first appointed to work at the College in 1962, he rose to the office of Garter Principal King of Arms in 1992, a position he held until 1995. He was the first Canadian ever to be appointed to the College of Arms. He was first appointed Rouge Dragon Pursuivant of Arms in Ordinary in 1962 and six years later became York Herald of Arms in Ordinary. In these capacities, he was among the Earl Marshal’s staff for the State Funeral of Sir Winston Churchill in 1965, the Investiture of the Prince of Wales in 1969, and was Gentleman Usher-in-Waiting to Pope John Paul II during his visit to the United Kingdom in 1982.

Swan was appointed Garter Principal King of Arms in 1992 on the retirement of Sir Alexander Colin Cole. His own retirement came in 1995, after having been diagnosed with cancer.

Swan was knighted by Her Majesty The Queen in 1994 as a Knight Commander of the Royal Victorian Order (KCVO). He is also a Knight Grand Cross of the Order of the Nation of Antigua and Barbuda (KGCN), Knight of Honour and Devotion of the Order of Malta, Cross of Commander of the Order of Merit of the Republic of Poland, Knight’s Cross of the Order of the Grand Duke Gediminas (Lithuania), Knight Grand Cross of Justice of the Sacred Military Constantinian Order of Saint George, Knight Grand Cross of the Royal Order of Francis I (GCFO) and Knight Grand Cross of the Royal Order of the Lion of Rwanda.

He was also a Knight of the Most Venerable Order of St. John of Jerusalem and Knight Principal of the Imperial Society of Knights Bachelor (1995–2000); Commander (with Star) of the Royal Norwegian Order of Merit; Grand Cross with Grand Collar of the Imperial Order of the Holy Trinity (Ethiopia); Coronation Medal of the King of Tonga. He received the Commemorative Medal for the Centennial of Saskatchewan in 2005.

May he rest in peace.