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This happens with western names as well. Jo, Bo, Malcolm X.

Wasn't he just known as X though? His legal name would have been Islamic and his birth name was Little.

If you are Malcom X and you create, let's say, a Facebook account, then your last name is X.

Harry S Truman's middle name was the letter S.

Ditto Ulysses S Grant (though he wasn’t born with that name).