Weinstein (wine-steen): The surname of disgraced Hollywood producer Harvey Weinstein. Linguists have debated the pronunciation of his name, which strictly (some argue) should rhyme with Einstein. But Weinstein himself pronounces it "wine-steen."
"Ultimately," says Katja Wilde, Babbel's head of didactics, "people can choose to pronounce their name however they please."
Yes, with an important proviso -- you can't expect others to follow if you're going to use an arbitrary, non-grammatical pronunciation for your name's letters.
I am studying German, and I'm here to tell you that "stein" is pronounced "STINE" like "Einstein". And "Wein" is pronounced like "VINE". It's literally the german word for "wine stone".
Anyhow, you can spell your name "M-I-K-E" and insist to everyone your name is to be pronounced "John" but don't expect a lot of takers! On the contrary, expect literally everyone to get your name wrong -- and here's the catch: they are all right, and you're wrong.
Everyone (or every parent) is free to call themselves (or their child) what they want. However, no one has a right to redefine one or more letter pronunciations in the process. Nor can you make up your own letters. Not if you expect people to be able to pronounce your name properly.
Save the beatnik, incongruous random creativity for a live art display. In real life, there is such a thing as phonics (which varies by language, but every language has rules of phonics).