The first name is the name given to a child upon birth and upon baptism as a Christian name. In addition, the first name appears first when writing the name of a person. On the other hand, the last name is the name that appears last when writing the name of an individual.
Is your surname first or last?
Definition of a surname. In the Anglophonic world, a surname is commonly referred to as the last name because it is usually placed at the end of a person's full name, after any given name.