What is the Latin exclamation of surprise?
ecce (astonishment) behold! ehem (pleasant surprise) wow!
What are common Latin interjections?
Terms used to express surprise or attract attention include "heu!" or "eheu!" (alas!), more commonly "vae!" with the same meaning, "euge!" (hurrah!) and "amen!" (truly, let it be) borrowed from the Hebrew. Invocations of the lower gods are plenty; most commonly "Pol!" (by Pollux!) and "mehercle!" (my Hercules!)