Old Norse persons with the name Halfdan ("half dane") (Old Norse sources) or Healfdene (Beowulf) or Haldan (Danish Latin sources) were probably kings.

• Present time:
  • Halfdan Rasmussen (famous dane)
• Halfdan (Old Norse) (some may be literary figures)
  • Halfdan the Old
  • Halfdan Hvitbeinn
  • Halfdan Ragnarsson
  • Halfdan the Black
  • Halfdan the Mild
  • Halfdan the Kind