Surname 柏楊 (Boyan 
, 柏楊) , all over the world, is quite a rare cognomen. The cognomen 柏楊 is characteristic of Bolivia, where it is quite a rare surname, Singapore, where it is a rare surname, and Bulgaria. In absolute terms, it is commonest in Indonesia, the United States, and Turkey. Also, 柏楊 is the forename as well as the last name.