Passport don't have last name

[nitin.developermca]

Hi,

My passport don't have last name. Below is the latest travel booking.

Passport : FirstName is "ZZZ YYY" and Last name is ""
H1 B visa : FirstName is "FNU" and last name is "ZZZ YYY".
Flight Ticket (airline suggested and booked tickets): FirstName "ZZZ YYY" and last name "ZZZYYY".

Please let me know if there is any issue in immigration while coming back from India.

Thanks,
Nitin