Vetia was a Russian Cossack whom Bob and Muriel met shortly after arriving in Paris in 1925.  Being very hungry and having no money, Muriel and Bob decided to dine at the Café du Dome.  When they were unable to pay the check, Vetia, who happened to be dining nearby, offered to pay it for them.  Vetia was instrumental in helping Bob & Muriel get their first job in Paris at the Chateau Caucasien.