Your question is similar to asking who invented or discovered the square or circle. There is no originator or inventor -- or even discoveror. That particular geometric solid has always existed.
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A (right circular) cylinder has 2 circular faces... one on top, and the other the bottom.
The object described is a cylinder, specifically a right circular cylinder. It is a round solid with flat circular ends.
A [right] cylinder
right circular cylinder
Archimedes