E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Copronymus.
So Constantine V. was surnamed (718, 741–775). “Kopros” is the Greek for dung, and Constantine V. was called Copronymus: “Parce qu’il salit les fonts baptismaux lorsqu’on le baptisait.”
