Proper Noun

A proper noun names a particular person, place, or thing and begings with a capital letter. It's more specific than the common noun.

Examples:

• James
• Julie
• California
• IBM, General Motors
• Neiman Marcus
• Applebee’s
• Mckinley
• Ireland, France, America
• Betty
• Lieutenant Mark Davis
• the Mississippi River
• University of Georgia

Source: http://www.k12reader.com/proper-nouns/