In Sept 2002 I received my UEL Descendant Certificate. On it, it states:

"N.B. Those Loyalists who have adhered to the Unity of the Empire, and joined the Royal Standard before the Treaty of Separation in the year 1783, and all their children, and their Descendants by either sex, are to be distinguished by the following Capitals affixed to their names: "U.E."

Also:
I am the first "Stymiest" descendant to prove his lineage from Benjamin Stymiest II, UE, a United Empire Loyalist who arrived in New Brunswick in 1783 after the Revolutionary War. I am the 4th. Great-grandson of Benjamin Stymiest II, UE who received a Land Grant in Bay du Vin, NB; as well as, his SON, Benjamin Stymiest III, UE ( my 3rd. Great-grandfather) who received Land Grants in Bay du Vin, NB and Tabusintac, NB.

You may also want to check out the following titles:
(1)Moore,Christopher, "The Loyalists:Revolutiion, Exile, Settlement" pub. by McClelland & Stewart.
(2) Stymiest, Carl, "Down By The Old Mill Stream: A Stymiest Chronicle", pub. by Trafford Publishing.
(3) Wright, Esther Clark, "New Brunswick Loyalists"
(4) MacDonald, M. A., "Rebels & Royalists", pub. by New Island Press.
(5) Rees, Ronald, "Land of the Loyalists", pub by Nimbus Publishing.