10. Charles 'Pretty Boy' Floyd
It is a known fact that Charles Arthur Floyd hated his nickname, but sources disagree on how he received it. Two stories are given, one stating "Pretty Boy" was given to him by the prostitutes from the whorehouses he frequented and the second states that he earned his nickname from a description of him in his first major robbery as "a pretty boy." He hated the name so much that he killed other gangsters for calling him by the nickname. In fact, after being gunned down, with his dying breath he made one final declaration, "I'm Charles Arthur Floyd."
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