Aperson is great who has greatness. None becomes great by his name only and none becomes merely great by sitting on a high place. Is a mouse, sitting on the mountain considered greater and an elephant standing down, considered lower? No, this measurement is wrong.
Right measurement is that, a person whose works are good is great and a person whose works are bad is a trivial person. There is a famous dish called ‘Bada’ which is made of wead pulse. But it is not cooked easily.