Hendrik Lorentz and Paul A. M. Dirac

Hendrik Lorentz (1853-1928). Photo from public domain.
Hendrik Lorentz was born in 1853, twenty six years before Einstein. Click here for his biography. He was a creative mathematician and as well as a great physicist. As for his mathematics, the Lorentz transformation provided a groundwork for Einstein's relativity. He formulated the concept of Lorentz contractions.