No Surname..help !!!

[rtrmsh]

Friends,

While filling out my parent's visa application form , I noted their passports had nothing in the surname column.

My father's name is CHANDRAN SUNDARAM RAMAN

My mother's name is SWATI RAMAN

On both their passports the surname column is blank and the Given names column has this entire name. I tried filling out the DS -156 form online but it says the surname column is mandatory . Can I split up and write the name ?

Any help would be appreciated !

R.T.

[immihelp]

Read https://www.immihelp.com/passport-fo...r-immigration/

[sunilv]

I have applied for a Tourist Visa for my mother last day and the Interview date is on May 02.
Her name in Passport is like this:

Surname: ....................(blank)
Given Names: MARY VARGHESE

On the Online Application Form I entered,

Surname: MARY VARGHESE
First and Middle Names: FNU i.e., First Name Unknown (On website they asked to use like that if I want to)

Is it correct or not?
In my Interview Letter the name displays as FNU MARY VARGHESE

Whether it make any issues later when I apply an Immigrant Visa or GC for my mom?

If it is wrong please do I need to cancel the Appointment since I am not able to modify those fields?

Is there any problem If I split her name and write first name in first & middle name cloumn and last name in surname column in DS-156?

Can I make the Observation at Passport Office and show this change to take effect in my DS-156 at the time of Interview?