Jules Henri Poincare lived from 1854 to 1912. He was a famous mathematician to come from France. He made many contributions to pure and applied mathematics, mathematical physics and celestial mechanics. He was the one who came up with the Poincare conjecture. He was the first person to present the Lorentz transformations in their modern form. I am sure you guys have heard about the Poincare group that is used in Physics and Mathematics. That group is named after this guy.