I need suggestion for my case
I my passport my name mentioned as firstname xxxxxbhai lastname
All my education certificates it’s mentioned last name first name xxxxxlal
Where xxxxx is my middle name, postfix is different in passport and my education certificate.
How can I avoid any issue in petition or interview?
This should be okay. At most your father can provide a notarized affidavit that you can carry to your interview. Consular officers in India are aware that Indians user bhai/lal etc specifically in Gajarat so this shouldn’t be a big deal.