Sir Peter Llewellyn Gwynn-Jones KCVO KStJ FSA (12 March 1940 – 21 August 2010) was a long-serving Officer of Arms at the College of Arms in London.

In 1973 Gwynn-Jones was appointed Bluemantle Pursuivant of Arms in Ordinary.

Gwynn-Jones was appointed Lieutenant of the Royal Victorian Order (LVO) in 1994, promoted Commander of the Royal Victorian Order (CVO) in 1998, and appointed Knight of Justice of the Most Venerable Order of the Hospital of Saint John of Jerusalem (KStJ) in 1995.

[7] In anticipation of his retirement The Queen promoted Gwynn-Jones Knight Commander of the Royal Victorian Order (KCVO) in the 2010 New Year Honours.

[8] Gwynn-Jones's autobiography, The Coati Sable: The Story of a Herald, was published by The Memoir Club in 2010, coinciding with his retirement as Garter[9] The title is a reference to the coati (a type of American raccoon) that featured on Gwynn-Jones's own coat of arms and served as a punning allusion to Coity, Glamorganshire.