You're being pedantic.
Sure, caminus the word is what you said, but this character is named Caminus - who knows how they choose for their name to be pronounced?
"Hi, my name is Cammy-ness."
"Ooh nice name!"
"Yeah my folks named me after some some latin work called Cah-mee-noos, but I like the way my name sounds better."
Never assume the pronunciation of names (proper nouns), even if they are derived/taken from previously used words. Just take it as a new fictional robot's name, derived from a latin word, using the same spelling, but pronounced differently.
Edit - To add, has anyone officially stated that this particular character's name is in fact taken from the Latin word? Or is it a completeney ficticious name that happens to share the spelling?
See how ridiculous these trivial things can spiral into?
Edit - and I know of the TF titan Caminus, but he is a different entity so that is moot.