From a number of newspaper articles I can say that Jasmin is used a lot as a male name by Roma and Sinti. Flower names do not seem to be uncommon in these cultures. I have read about a little boy named Tulipan too.
The Jasmine flower is originally from what is now known as India and that is where the Roma come from also. They came along with the Ottoman Turks, because they were the lowest caste in the caste system for determining status. By joining the Turkish army their status improved.