Naw. Perry de Havilland is his real name - he’s not ripping off anyone. Perry’s been around for ages and is behind one of the UK’s earliest libertarian blogs (Samizdata.net).I noticed one of those tweets came from someone called Perry de Havilland, which is a rip off of Terry de Havilland, high end shoe designer for rock stars, goths and sex workers, so I would say that person knows exactly what troons are.
Here's Terry's obit