What do Sir Isaac Newton, Steve Jobs, and Eve have in common?

Yarrrr I be slicing and dicing with me sword, Serving my honorable feudal lord. Bound by a code, not gold or booty, Me honor’s heavier than any glory. What I be, knight of the East?

I'm both a myth and actually exist. My mythical form is a king that can kill with one look. In real life, I'm quite badass too. I can run on water!

I’m a count of Latin descent, a number I merely rent. This riddle is one of near quincentennial sum, so please don’t downvote in hate. Use basic Roman skills, count upward with care, Read the number in my hint to find me there. One more than ninety five, with four to the left side, Written in Latin, not West Germanic guise.

Formerly associated with the labor of the ancestors, Now I'm mostly known as a shape, where the higher part of me gets smaller. My volume is one-third my base area multiplied by how tall I am.