The proper adjective for Persia is spelled "Persian." This term is used to describe anything related to Persia, including its culture, language, and people.
Persian
The proper adjective of Persia is "Persian." It refers to anything related to the historical region of Persia, which corresponds to modern-day Iran, including its culture, language, and people. For example, one might refer to Persian art, Persian literature, or the Persian language.
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.
Athenian is a proper adjective for Athens.
Egyptian is a proper adjective.
Persian
The proper adjective of Persia is "Persian." It refers to anything related to the historical region of Persia, which corresponds to modern-day Iran, including its culture, language, and people. For example, one might refer to Persian art, Persian literature, or the Persian language.
The correct spelling of the proper adjective is Scandinavian.
Persia
The likely term is the proper noun, an historical region, Persia (now Iran).
Those letters will spell the proper noun or proper adjective African.
The correct spelling of the proper noun or adjective is Portuguese.
That is the correct spelling of the proper adjective Virginian (from Virginia).
The proper adjective or term for people from China is Chinese.
The correct spelling of the proper noun or adjective is Jamaican.
An adjective describes a noun. You could potentially describe a person or thing as "Vietnamese".
The likely word is the proper adjective and demonym Chinese (of or from China).