Siegfried Lüdden (20 May 1916 – 13 January 1945) was a German U-boat commander in World War II and recipient of the Knight's Cross of the Iron Cross (). The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership. Lüdden is credited with the sinking of 8 ships of and one warship, the HMS Beverley, and damaging a further ship of . Among others, he and Korvettenkapitän Wilhelm Franken were killed on 13 January 1945 when a fire broke out on the accommodation ship Daressalem in Kiel harbor.