I have a in filling the gre form online?

Hi,
i have a problem in filling of the form online to create a gre account.
my name as it appears in passport is :
surname- RAMINENI
given name- VIKAS REDDY
during the process of creating a gre account i encountered 3 fillin boxes :
first name (mandatory):
middle initial:
last name or family name (mandatory):
i am confused about what to fill in the boxes… since it doesnt allow names with a space in between plz help me

Here you go:

first name (mandatory):  Vikas Reddy
middle initial: 
last name or family name (mandatory): Ramineni



 

Last name, Family name or surname all mean the same.