I’m glad that Facebook now has allowed empty last name in their account setting. That’s why, I officially write my name just as it is.
Not all country has the same citizens’ name regulations.
In Indonesia, birth name can be one word only or as many words as they want and their father’s name is not necessarily included in their birth name. It can be included by choice. This makes it hard to define Indonesian name into standard name form like:
First Name, Last Name or
First Name, Middle Name, Last Name