Last name correction in father passport

[rsadhu]

Hi,

Recently my father got passport, but his last name & my last name is slight difference ( my father's SADU & mine is SADHU). All my records are having SADHU. My fathers records having SADU.
Now I am planning to bring my parents on Visitiors Visa to USA.
At the time of VISA stamping , Is cosulate people is going to question ?

Please let me know if my father needs to get any supporting documents. My mother possport also having my father last name as SADU.

Thanks in Advance,
Raj.

[immihelp]

I don't that is going to be a problem.

Consulate people are aware of such variations in name as names are spelled in English script while they are actually Indian names.