Findings:

• Markus (user)
• Markus Reuter
• Markus Popp
• Markus Kajo
• Markus Reinhardt
• Markus Naslund
• Markus Sittikus
• Markus Auralius (user)
• Markus Wolf
• fakuta markus (user)
• Markus Rothkranz

If you Log in you could create a "Markus Acher" node. If you don't already have an account, you can register here.