Lewis Short
impostor | inp- (noun M) : (), , impono, II. B. 3.
* A deceiver, impostor (post-class.; cf.: planus, sycophanta), impostores aut mendaces aut litigiosi,Dig. 21, 1, 4, ยง 3; Hier. Ep. 38 fin.; 54, 5; Paul. Nol. Carm. 21, 338.
Charlton T. Lewis, Charles Short, A Latin Dictionary