The phrase "a commonwealth with" is correct and usable in written English.
It can be used when discussing a political entity or organization that operates as a commonwealth, often in relation to its relationships or agreements with other entities.
Example: "The region was established as a commonwealth with the aim of promoting economic cooperation among its member states."
Alternatives: "a commonwealth alongside" or "a commonwealth in partnership with".
He justified the beheading of Charles I in 1649, welcomed the the rebellion that established a commonwealth with its promised transformation of English life (comparing it to the liberation of the Israelites from Egypt), served that government and watched, with his dimming sight, as it went awry, the rebel becoming, in his words, an "old Priest writ large".
It declared that Puerto Rico was not a commonwealth with any degree of sovereignty, but was merely a territorial possession of Congress.
In 1652 Scotland was declared part of a Commonwealth with England and Ireland and the Privy Council and courts ceased to exist.
He may be ruling, but he's ruling over a commonwealth with the lowest median income in the country, where too many counties have infant mortality rates comparable to those of the Third World.
Under the Tender of Union, Scotland was declared part of a Commonwealth with England and Ireland in 1652, but despite repeated attempts, an act was not passed in Westminster to ratify the union until 1657.
A U.S. commonwealth with a population of 3.6 million, Puerto Rico carries more debt per capita than any state in the country.
Commonwealth Healthcare Corporation Hospital (CHCC) is the only hospital serving the island of Saipan, a US commonwealth with a population of about 50,000.
Its current leader, Gov. Ricardo Rosselló, and his New Progressive Party advocate statehood as the solution to Puerto Rico's second-class status while the Popular Democratic Party supports remaining a commonwealth, but with more autonomy from the United States.
It did not attain independence until 1981, when it became a Commonwealth realm with the British monarch as its head of state.
The islands, an American commonwealth with a large garment industry that employs mostly Chinese laborers, hired Mr. Abramoff in 1994 to help its government fend off legislation imposing American standards on wages and working conditions.
In 1991, with Labour still in opposition and a general election due by June 1992, he proposed the Commonwealth of Britain Bill, abolishing the monarchy in favour of the United Kingdom becoming a "democratic, federal and secular commonwealth", a republic with a written constitution.
