As of 2016, who is the only winner of a Formula One Drivers' championship to do so in a car bearing his own name?

Answer 1

Jack Brabham This was in 1966.

Jack Brabham became the first man to win a Formula One world championship race in a car bearing his own name. Only his former team mate, Bruce McLaren, has since matched the achievement. It was the first in a run of four straight wins for the Australian veteran.