Bitcoin has been created by a person or a group of persons under the name of Satoshi Nakamoto. Its an alias.
Multiple persons claimed or were suspected to be Satoshi Nakamoto.
Many theories exist about the real identity of this/these person(s). One of them is that NSA knows who is behind BTC : Using stylometry, they compared the thousand of posts on internet Satoshi wrote before disappearing to datas they collected (and probably reduced to a short list of cryptography analysts active at this period).