These two unnamed vampires were vampires who were at some point captured by Cuthbert Sinclair and put into his "zoo."
History[]
At some point, Cuthbert Sinclair, better known as Magnus, captured these vampires for his "zoo" where he held a variety of supernatural creatures including at least one shapeshifter. When Sam Winchester and Dean Winchester managed to access his secret lair, Magnus released the two vampires to test the two hunters. After Sam and Dean kill the two vampires, Magnus congratulates the two hunters and welcomes them.