Go to Wikipedia for the information on the colonization and history of Guyana. The Wiki article states it needs more documentation for some of the information but this is general information on Dutch and French ancestors who eventually settled in french speaking areas of New Hampshire in the 1820's (after British rule came to Guyana).  It was a Dutch selltmenet in the 18th and 19th century. Was lost to the French, then back to Dutch East Indies Company control, then became a British Colony in 1812.

"The city of Georgetown began as a small town in the 18th century. Originally, the capital of the Demerara-Essequibo colony was located on Borselen Island in the Demerara River under the administration of the Dutch. When the colony was captured by the British in 1781, Lieutenant-Colonel Robert Kingston chose the mouth of the Demerara River for the establishment of a town which was situated between Plantations Werk-en-rust and Vlissengen.

It was the French who made it a capital city when they colonized it in 1782. The French called the capital Longchamps. When the town was restored to the Dutch in 1784, it was renamed Stabroek after Nicolaas Geelvinck, Lord of Stabroek, and President of the Dutch West India Company. Eventually the town expanded and covered the estates of Vlissengen, La Bourgade and Eve Leary to the North, and Werk-en-rust and La Repentir to the South.

It was renamed Georgetown on 29 April 1812 in honour of King George III. On 5 May 1812 an ordinance was passed to the effect that the town formerly called Stabroek, with districts extending from La Penitence to the bridges in Kingston and entering upon the road to the military camps, shall be called Georgetown."