Wanderlust World Wanderlust World "Guyana hemisphere" doesn't exist. Guyana is a country on the northern coast of South America, between 1°N and 8°N latitude—entirely in the Northern Hemisphere and Western Hemisphere.
Northern South America (Guyana, Suriname, French Guiana, Venezuela, N. Brazil, Colombia) + Central America + Caribbean + North America = Western Hemisphere. The term "Western Hemisphere" is geopolitical (OAS, US policy), not just geographic.
Maybe confusion with "Guiana Shield" (geological province), "Guianas" (three Guianas), or "Southern Hemisphere" (most of South America). But Guyana is north of the equator.
Simple: Guyana is in the Northern and Western Hemispheres. No special hemisphere named after it.