^Which is weird if you think about it, since Latin didn't pronounce the long i
like "eye," but like "ee." So if we were being authentic to Latin pronunciation, it would be "Aven-teen."
Except, come to think of it, the actual Latin word isn't Aventine
, but Aventinus
(specifically Collis Aventinus
, the Aventine Hill
). So "Aventine" is an English word derived from Latin, not a Latin word. Which I guess is why your teachers favored an English pronunciation.
Yeah, it's not consistent with Latin pronunciation (in as much as that's a nebulous field polluted by Church Latin) but between High School and College the pronunciations were similar. They're no less strange than Aristotelian (Aris-to-teal-ian vs. Aris-totle-ian vs. Aris-total-ian).
As for Dygan, I'd probably say "DIE-Gun" similar to Hogan or Logan.