Possible Clues:

• Dumbarton denizen
• Macbeth or Macduff
• Kilt-wearer
• Fifer, e.g
• Duke of Edinburgh perhaps found in San Francisco town
• Macbeth, by birth
• Renfrew resident
• Robbie Coltrane, e.g
• James Watt, by birth
• Robert the Bruce, for one