Colorado is known as the Centennial state because it became a state in 1876, 100 years after the signing of the Declaration of Independence.
Nevada is known as the Silver State. The nickname was easily earn from the silver rush of the 19th century where silver was literally shoveled off the ground there.
Since Connecticut is also known as the Nutmeg state, people from Connecticut are also called Nutmeggers.
Maryland is also known as the Old Line State. Which many believe refers to a “line” of Maryland soldiers who bravely served during the American Revolution.
Idaho is also known as the Gem State due to its large supply of natural resources.