The proper adjective for holly is "holly." It is used to describe things related to the holly plant, such as "holly leaves" or "holly berries." In some contexts, you might also encounter "holly-like" to describe something resembling or characteristic of holly.
State
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.
State
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.
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.
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