The Lost Tribe of Simeon spreads out across various former colonies. This article estimates the extent of the Lost Tribe of Simeon in the world today.
Note On Thailand
Thailand is one of the few nations in the world never to have been colonized by Europeans. The linkage from Thailand to a lost tribe is thus harder to establish.
Thailand is linked here with Simeon because of the long history of French support for Christian missionaries in the country. Their work was notoriously poor, yielding less than 1 percent Christians in the country to this day, even including later protestant conversion.
This is thought to be in part because the country has been relatively prosperous throughout modern history. Alternatively, Thailand could be linked to Portugal and thus Gad, because the Portuguese were first to establish missions. They did not persist, ceding instead to the French.