I was trying to answer an enquiry from a 'Who do you think you are' magazine reader and came across this webpage (http://www.olshweston.org/debary/default.html) which listed the required Richard Brome de Bary. This then linked to the Mostyn family, and a further Google brought up a page (http://www.angelfire.com/realm/gotha/Part11.htm) which suggests that he is a descendant of King James I & VI.
Interestingly there is another entry on the same page -
Geraldine Mary Frances Mostyn (1892- ); m.10 Jun 1920 (annulled 1927) Simon Edwin Henry Orde (d.23 Apr 1953)
Could Simon Orde of Calico Pie be related to Royalty, albeit at a distance?
We must make sure that we show the correct level of deference when addressing him