family Somalinga father Rengan name Premkumar. What is Surname, middle and last names?

Question

My family name is Somalinga
My father's name is Rengan
My name is Premkumar.
I give my name as S.R.Premkumar
When filling up Passports and PAN card forms I have a problem.
Please tell me:
What are my Surname, middle and last names?

Answer 1

Premkumar : first name
Rengan : middle name
Somalinga : last name(surname)

Answer 2

your surname is your last name so it would be Premkumar Somalinga. you have the choice of using the middle or not.