Gregor MacGregor (24 December 1786 – 4 December 1845) was a Scottish soldier, adventurer, land speculator, and colonizer who fought in the South American struggle for independence. Upon his return to England in 1820, he claimed to be cacique of Poyais (also known as Principality of Poyais, Territory of Poyais, Republic of Poyais), a fictional Central American country that MacGregor had invented which, with his help, drew investors and eventually colonists.