Thailand used to be called Siam, which referred to only the people of Siamese ethnic however a name change to Thailand had a dual purpose. It was inclusive of all the other ethnics that were not Siamese and it was a proud notion that they were never ruled by the nations from the West. Literally translated Thai means 'Free,' thus Freedom-land.
FLAG of THAILAND
Thailand and Costa Rica are both tropical nations and were relatively centers of peace during the raging tempest of the Cold War. Central America & South East Asia were blazing with war, poverty, imperialism, Communist insurgencies, and all sorts of human induced tragedies. Somehow Thailand and Costa Rica made it out relatively unscathed unlike the killing fields of their neighbors Vietnam, Laos, Cambodia, Burma, Nicaragua, Panama, Columbia, El Salvador, Honduras, and Guatemala.
Thailand & Costa Rica were lucky and played their cards correctly. Thailand walked the peaceful path of the Buddhist while Costa Rica walked with peaceful path with the Pope.
It is a union of the Golden Buddha with the Golden Cross.