With me, the problem is my LAST name. Even with the example of English words like "haven" and "savings" which have a long A before a V, people everywhere have insisted on uttering my last name with a short A like in "cat."
As for your first name: shooting in the dark, I'll guess that the reason why you included the word "beyonder" in your USER-name here is because the sound of this word is somewhat similar to the correct pronunciation of your first name.
I'm pretty sure that, unike those who said "Rivets," those who said "Ravioli" were consciously joking.
About your "two-part" first name: perhaps add another E, make it "Dee Andra." This would have two advantages: ( 1 ) it would sort of separate the A further, and ( 2 ) there already are many women named "Dee," so this would not seem strange to anyone reading your name.
If an additional adjustment seems good, think about the old-time singer Dionne Warwick. She had an O where many women would have had an A. What would you think of being Dee Ondra?
My mother made it to her mid-nineties, and my father made it almost to ninety despite bad health habits. My genetic legacy from them is half of the reason why I can be as physically active as I am at nearly age seventy; the other half is that my health habits ARE good. SOME functions, cough cough, are pretty much gone, but at least I can still run around and do some physical work.
I used to hate being called Joe, because it seemed to have no dignity-- except when a military man was G.I. Joe. But as a history student, I learned that there were some REALLY GREAT guys named Joseph in the Bible.
Many Hispanic people carry a whole string of middle names. If your new first name is, for instance, Theodora, you could be Theodora Dee Ondra. No law against long names. In my mother's extended family, there was a woman called Clella Idella Galloway Herkelmann.