Reginald Fessenden
Reginald Aubrey Fessenden (October 6, 1866 – July 22, 1932) was a Canadian-born inventor, who did a majority of his work in the United States and also claimed U.S. citizenship through his American-born father. During his life he received hundreds of patents in various fields, most notably ones related to radio and sonar.
Ferdynand Antoni Ossendowski
Ferdynand Antoni Ossendowski (27 May 1876 – 3 January 1945) was a Polish writer, explorer, university professor, and anti-Communist political activist. He is best known for his books about Lenin and the Russian Civil War in which he participated.