Where did you get this information?
Is this just guesswork based on all the cumulative speculation?
Many Bothans died for it (and those that didn't were cryogenically frozen...)
Seriously though, my $$ is on JH being remnant of the "Eugenics Wars." It seems to be a logical guess based on the available information. Whether he's one of Khan's crew, or another remnant that remained on Earth is anyone's guess.
I would hope that JJ wouldn't do a TRON/Flynn/CGI version of Montalban for Khan. (I threw up in the back of my mouth a little bit just typing that out.