author
A catalog credit used for official works issued in the name of the British monarch, rather than a single personal author. It typically appears on proclamations, charters, letters patent, and other royal records that preserve the voice of the crown across centuries.

by Great Britain. Sovereign
In library and archival records, Great Britain. Sovereign is a collective author heading for documents issued under the authority of the reigning monarch. It is used for official material such as royal proclamations, charters, commissions, and correspondence, especially in historical collections.
Works listed under this heading include records like British Royal Proclamations Relating to America, 1603-1783, Massachusetts Royal Commissions, 1681-1774, and Regesta regum anglo-normannorum, 1066-1154. In many cases, the texts were later edited, compiled, or translated by historians and scholars, but the original issuing authority is still cataloged as the sovereign.
So this is best understood not as one writer with a single life story, but as a formal bibliographic label for generations of kings and queens whose official acts were preserved in print and manuscript.