Gregor von Helmersen
Gregor von Helmersen was born on October 11, 1803. See ranking, bio blurb, and everyone else born that day.
About Gregor von Helmersen
Gregor von Helmersen or Grigory Petrovich Helmersen (Russian: Григорий Петрович Гельмерсен, 11 October [O.S. 29 September] 1803 – 15 February [O.S. 3 February] 1885) was a Baltic German geologist.