The only Wikipedia page about him is in French and the New Yorker has their article about him locked in an archive. Given that this Bruno Furst fled Germany after Hitler came to power, this idea that he may have changed his name is plausible. Since “der Fürst” can mean “prince” or “ruler” in German, I have often wondered if the entire name is invented to say something about Giordano Bruno’s constant influence. It’s impossible to know, but I personally find it hard not to think about one of the most famous memory teachers, Giordano Bruno.
People familiar with the long tradition of memory techniques will probably think he chose to go by “Bruno” to attract the attention of people already familiar with memory techniques. He was a German lawyer and his full name was Johann Franz Bruno Fürst. Bruno Furst created a number of memory improvement courses and You Can Remember! is one of the most famous.