Father's name different in my passport Vs. his original docs

Hello Everyone,

I have a unique situation here:
I’m in USA.
In my passport, My father’s name is spelled as (Surname-1) (FirstName_without a letter A).
But all my father’s original docs - Adhar, voter-ID, PAN-card, etc have his name as (Surname-1) (Surname-2) (FirstName_with letterA). My father doesn’t have a passport yet.
I am planning on applying passports for my parents.

  1. How to rectify this issue while applying for my parents’ passports?
  2. Will there be any issue with the situation I have here either at VISA interviews or immigration, etc.?

Kindly help.
Thank you.