Yuriy and Yulia are from New York and as far as I know danced amateur as recently as Ohio. Both of these couples are lovely dancers that were in the final of USA Dance Nationals in 2012. Are the results available from the worlds?
Yuri and Yulia are the Russian equivalent of John Smith and Jane Smith... Very popular names. ;-)
The amateur guys are from the NY, very nice people. He recently graduated from Columbia, I believe.