Possible Clues:

• Oh, in Cologne
• Otto's "Oh no!"
• Lübeck lament
• "Oh my," to Ohm
• "Alas!" in Austria
• Dieter's beef?
• Lament from Ludwig
• Mann's 'Man!'
• Allentown : "Alas!" :: Altenburg : "__!"
• "Mein Gott!"