Surname Ysay (Исаи 
, Ysay 
, Исаы ) , around the globe, is a rare last name. The cognomen Ysay is habitual in Armenia, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Venezuela, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Armenia, Russia, and Bulgaria. Also, Ysay is the forename as well as the last name.