Wolff Wilhelm Lowenthal ((1850-02-15)15 February 1850 – (1894-04-22)22 April 1894) was a Polish-born, naturalized French Doctor of Medicine.
Born in Rybnik, Poland, after graduating from the University of Berlin, Lowenthal (or Löwenthal, with the umlaut), went to the Caucasus to continue his medical research.
At the same time, he was Professor at the University of Geneva, in its branch at the Lausanne, Switzerland.
He corresponded regularly with the Central Literary Bureau in Berlin.
On 17 June 1878, he had an important audience with Victor Hugo, to great public acclaim, where he pledged himself to France as his home country.