According to the dictionary the adjective for Louisiana can be "Louisianan" or "Louisianian" with the former being etymologically correct.
Another adjective, from Latin, is "ludovician." But this is used only taxonomically.
Some species of animals and birds have a Latin name containing "ludovicianus" which indicates the species origin or occurrence in Louisiana. Some examples:
- Black-tailed Prairie Dog (Cynomys ludovicianus) "Cynomys" derives from the Greek for "mouse dog" while "ludovicianus" means "from Louisiana"
- Rose-breasted Grosbeak (Pheucticus ludovicianus) "Pheucticus" may derive from the Greek word "pheuticus" meaning shy and retiring" while, again, "ludovicianus" means "from Louisiana" where the bird was first described.
The proper adjective for George is Georgian.
The proper adjective for Siam is Siamese.
The proper adjective for Antigua is Antiganantigan
Kuwaiti is the proper adjective for Kuwait.
A proper adjective is a descriptive word derived from a proper noun.Some examples are:Asia (proper noun) - Asian (proper adjective)Brazil (proper noun) - Brazilian (proper adjective)Canada (proper noun) - Canadian (proper adjective)Elizabeth I (proper noun) - Elizabethan (proper adjective)Sigmund Freud (proper noun) - Freudian (proper adjective)George Orwell (proper noun) - Orwellian (proper adjective)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."
Vietnamese is the proper adjective for Vietnam.
The proper adjective for George is Georgian.
The proper adjective for Siam is Siamese.
Mayan is itself a proper adjective.
Freudian is the proper adjective for Freud.
The proper adjective for Georgia is Georgian.
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 Antigua is Antiganantigan
Kuwaiti is the proper adjective for Kuwait.