Originally Posted by
SPN Lifer
The technical term for this "II" is a "generational suffix".
I don't know when "Jr" became "II". It used to be that the numbers started at "III".
But re: names on passport, really, no one will care or notice. I've had airlines issue tickets for me with the salutation (honorific?) as the middle name due to shoddy IT (UA app) and no one bats an eye.