Billy Markus is ne of the co-founders of Dogecoin, along with Jackson Palmer. Markus is the programmer who modified an existing litecoin wallet, creating dogecoin-qt.
He goes by the pseudonym Shibetoshi Nakamoto on Twitter.
Creator of the original DogeCoin code
http://dogecoin.wikia.com/wiki/Billy_Markus
http://motherboard.vice.com/blog/dogecoins-founders-believe-in-the-power...
https://twitter.com/billym2k