Burman (Proper)
Burmese (Common)
Vietnamese is the proper adjective for Vietnam.
The proper noun is Burmese (a person of Burma, now Myanmar). The word Burmese is also a proper adjective; for example the Burmese language is still the official language of Myanmar.Note: proper nouns and proper adjectives are always capitalized.
The proper adjective for southwest is "southwestern."
The proper adjective is Haitian.
The proper adjective for Portuguese is "Portuguese."
No, old is not a proper adjective. A proper adjective is an adjective derived from a proper noun, such as Swiss cheese, Bolivian pottery, Chinese silk, etc.
The proper adjective for George is Georgian.
Mayan is itself a proper adjective.
The proper adjective for Siam is Siamese.
The proper adjective for Georgia is Georgian.
Freudian is the proper adjective for Freud.
Since the original name of Myanmar is Burma the people of Myanmar are still being called as Burmese. Myanmar.com refers to it's people as 'Myanmar people'.