Commonwealth (U.S. state)

Commonwealth is a term used by four of the 50 states of the United States in their full official names: Kentucky, Massachusetts, Pennsylvania, and Virginia. "Commonwealth" is a traditional English term used to describe a political community as having been founded for the common good, and shares some similarities with the Latin phrase "res publica" ('the public thing'), which ultimately is the origin of the word "republic".

Source: Wikipedia — Commonwealth (U.S. state) (CC BY-SA 4.0)