For one thing you have a conflict between onion and ion. Also the Ai could be pronounced like a long A or like eye. That's four pronunciations right there. You might also get the inion part pronounced like the bump on the back of the skull, IN-ee-un, giving you Ay-IN-ee-un. I'd be interested in know what all pronunciations you got from your random people. BTW, I googled "ainion" and got 14 billion hits. Might not be a real good name.