In what year was the man under whose command the 1st U-boat Flotilla was founded born?
1st U-boat Flotilla:  Founded on 27 September 1935 under the command of "Fregattenkapitän" Karl Dönitz, it was named in honor of "Kapitänleutnant" Otto Weddigen. Karl Dönitz: Karl Dönitz (sometimes spelt Doenitz) (] ; 16 September 1891 – 24 December 1980) was a German admiral who played a major role in the naval history of World War II.
1891