St. Joseph Vaz, CO,(Konkani: Bhagivont Zuze Vaz; Portuguese: São José Vaz; Sinhalese: ශාන්ත ජුසේ වාස් පියතුමා Santha Juse Vaz Piyathuma; Tamil: புனித ஜோசப் வாஸ்), 21 April 1651 – 16 January 1711) was an Oratorian priest and missionary in Sri Lanka, then known as Ceylon.Vaz arrived in Ceylon during the Dutch occupation, when the Dutch were imposing Calvinism as the official religion after taking over from the Portuguese.