Is "Yatogami" a name or a title? In Noragami, the main character refers to himself as "yatogami". I'm not sure if that's his name or his title. A quick google search shows that its a surname, but the way he said it makes me think its some kind of title.
In Noragami, Yato refers to himself as a god. 神, which is the kanji for god, can be pronounced "gami", so he is probably referring to himself literally as "Yato God".