Here's a few I've seen so far, some are pretty funny
Arc - Shiki = "Moonlight - Lovers"
Warc - Nanaya = "Doomsday"
V Sion - Sacchin = "Becoming Vampires"
Aoko - Shiki = "Defenders of Justice (President & Secretary)"
NAC - NA = "Great old Cats"
kohaku - Hisui = "Kohaku & Hisui"
Wallachia - V Sion = "Sand of Hades, King of Lies"
Wallachia - Nrvnqsr = "Elder Title"
NAC - Mech Hisui = "No one really knows at this point"
Ciel - Akiha = "Splendor from above"
Shiki - Sion = "Midsummer Night's Dream"
Arc - Ciel = "Female Friendship - Megaton Punch"
Akiha - Aoko = "Lady and Sorceress"
Shiki - Miyako = "China Paradise Assault"
Mech Hisui - Mech Hisui = "M x M x M x M"
Post your combinations, and which ones you like the best^^