Possible Clues:

• Bob -, US singer
• "Blonde on Blonde" singer Bob
• Bob . . . . ., . . . . . Thomas
• 'Lay Lady Lay' writer
• 'Maggie's Farm' singer
• Singer/songwriter Bob
• Chalamet portrayed him in "A Complete Unknown"
• "Under Milk Wood" poet's first name
• Bob or Thomas messing with Lady Hamilton's rear
• ... Thomas, Welsh writer