The name is Heisenberg. And the principle applies to much more than just position and momentum. Look into the other startling consequences of measuring particles!
I remember when a professor was teaching Heinsberg Uncertainty Principle to us in class, and when he asked us whether we had any doubts. One of my classmates stood up and curiously asked -
"Sir, was Heinsbert a male of female?"
We laughed like hell on this for a minute.