Possible Clues:

• Boxer Max
• Max of "The Beverly Hillbillies"
• 1930s boxing champ Max
• 1930s heavyweight champ Max
• '30s heavyweight champ
• Max of ''The Beverly Hillbillies''
• 1930s heavyweight champ
• Pugilist Max
• Boxer Buddy
• Heavyweight champ of the 1930s