Namesakes
Nobel Prize Winners:
1 medicine
(medicine) Feodor Felix Konrad Lynen 1964 
Notable Businesspeople:
1 businessperson
Ingvar Kamprad (a.k.a. Feodor) 1926-2018
Notable Musicians:
1 singer
Feodor Chaliapin 1873-1938
Notable Scientists and Inventors:
1 physicist
Gustav Mie (a.k.a. Feodor) 1868-1957
Other Royalty:
1 prince
Alexander Ferdinand of Prussia (a.k.a. Feodor) 1912-1985 Prussia
Russian Grand Dukes and Tsars:
3 tsars
Tsar Feodor I 1584-1598
Tsar Feodor II 1605
Tsar Feodor III 1676-1682