If you go right back to the beginning of his 'register', you see that P Charles and the Croc Wife are listed as his clients amongst many others.
I reckon his Wikipedia entry is one of the longest. Some added self authoring? There's a touch of the Rothschilds there too.
'In January 2014, he dismissed the sum of £250,000 spent on MPs' portraits as trivial by saying "I'm all for saving money, saving money right, left and centre, but this is chicken feed". In December 2014, Rees-Mogg was reported to the Independent Parliamentary Standards Authority for speaking in debates on tobacco, mining, and oil and gas without first verbally declaring he was a founding partner and director of Somerset Capital, which manages multimillion-pound investments in these sectors. The Parliamentary Commissioner for Standards, Kathryn Hudson, decided that no wrongdoing had been committed and thus no investigation would take place. According to The Daily Telegraph, Rees-Mogg's extra-parliamentary work took up 476 hours, or 9 hours per week, in 2014.'