Ivor Thord-Gray (born Thord Ivar Hallström) (April 17, 1878 – August 18, 1964) was a Swedish-born adventurer, sailor, prison guard, soldier, government official, police officer, rubber plantation owner, ethnologist, linguist, investor, and author.

[1] He participated in thirteen wars spanning the continents of Africa, Asia, North America, and Europe.

[2] In 1923, Ivor Thord-Gray returned to Sweden and wrote a book about Mexican archeology Från Mexicos forntid : bland tempelruiner och gudabilder.

In August 1935 he was appointed Major-General and Chief-of-Staff to Governor David Sholtz of Florida.

He also wrote a book about his experiences in the Mexican Revolution, Gringo Rebel: Mexico 1913–1914 (Coral Gables, Fla. : University of Miami Press, 1961).