Rapha was short for Saint Raphaël, the brand name of a drink that was part tonic, part apéritif. It was first created in 1830 when a doctor was trying to make a herbal tonic but found his eyesight fading at the same time. He recalled a biblical tale of Archangel Raphael who cured Tobias of his blindness. The medic finalised the recipe for his drink, his eyesight returned and lo, Saint Raphaël was created. Like many pharmaceutical concoctions in the mid nineteenth century – mineral water, Coca Cola – it became a commercial success. This was helped in part because it used by-products from the wine business to which herbs including Quina bark which contains quinine.
Why the abbreviated Rapha instead of St Raphaël, the drink’s full name? Back in the 1950s the Tour de France organisers refused to allow openly commercial teams, only bike industry sponsors were allowed. So the Rapha-Géminiani tried to pretend there was no commercial link, that the team was simply named after the team’s directeur sportif, Raphaël Géminiani. But this was a ruse, the directeur sportif‘s first name just coincided with the sponsor and in fact the funding was coming from the company behind the beverage.
source – here