Bertrand de Thessy (died 1231 at Acre), also known as Bertrand of Thercy, was the fifteenth Grand Master of the Knights Hospitaller, serving between 1228 and 1230 or 1231.[1] He succeeded Guérin de Montaigu upon his death on 1 March 1228. Thessy was either from France or Italy, most likely the former. He was succeeded by Guérin Lebrun.[2]
- ^ Bernard de Thessy Archived 2021-12-03 at the Wayback Machine. Masters of the Hospitallers (2020).
- ^ Josserand 2009, p. 984, Bertrand de Thessy.