Thank you, Merlin.

Perhaps the best way to respond to such obscurantism is to note that the author claims to be the "eighth Prince-Abbot of San Luigi", and writes of himself,

"The eighth and present Prince-Abbot, and the sixth Mukungu, is the Most Reverend John Kersey (regnal name Edmond III), who succeeded in August 2011. He is a British educationalist, musician and clergyman. In 2015, the Prince-Abbot also succeeded his adoptive father Prince Kermit de Polanie-Patrikios as Head of the Royal House Polanie-Patrikios (dynastic heir to several of the Byzantine Roman Imperial Houses and to the earliest rulers of Poland), and as pretender to the throne of Belarus, uniting this administration with the Abbey-Principality. The historical and legal basis of the sovereignty of the Abbey-Principality and the Royal House Polanie-Patrikios is discussed here."

[Please see: https://san-luigi.org]

I cannot imagine that HM The King or anyone operating on his behalf would contest the author's right to use his regnal name, Edmond III, on all legal documents in the UK, including on his passport and drivers licence. But wait, the author would travel on a passport that he issued, himself, or, perhaps, does not need one when he travels internationally, being a sovereign ruler.