Thanks for your answers. Interesting page, this faux ami page. After wondering about the English patron for a while, I recently came across that explicit question when reading Watanabe, S. (1985). Pattern Recognition: Human and Mechanical. New York, NY: John Wiley & Sons. In Watanabe's intro there is a section on the etymology of the word 'pattern', being derived form patron. And in there he asks the question about that inverted meaning as a recreational quiz - without giving the answer though. I will keep looking, I find this quite interesting. Thanks again.