The proper noun Carolina (North and South Carolina, US states) has the adjective form Carolinian.
(This is also the noun, or demonym, usually preceded by the word North or South for those states.)
Carolingian
North Carolinian
The proper noun Carolina (North and South Carolina, US states) has the adjective form Carolinian.(This is also the noun, or demonym, usually preceded by the word North or South for those states.)
The proper adjective for Portuguese is "Portuguese."
The proper adjective for Haiti is Haitian.
The proper adjective for southwest is "southwestern."
Vietnamese is the proper adjective for Vietnam.
The proper adjective for George is Georgian.
The proper adjective for Siam is Siamese.
Freudian is the proper adjective for Freud.
The proper adjective for Georgia is Georgian.
The proper adjective for Mayan is "Mayan."