Fritz Frauenheim (9 January 1912 – 28 September 1969) was a German U-boat commander of the Second World War.
From September 1939 until retiring from front line service in December 1940, he sank 19 ships for a total of 78,853 gross register tons (GRT), and damaged two others.
For this he received the Knight's Cross of the Iron Cross (German: Ritterkreuz des Eisernen Kreuzes), among other commendations.
The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership.