Legal name changes are fine. Mine's terrible also, as are some of my friends who have no Jew in them.
As for your Yahoo account, that can be looked up online.
While changing your name in most areas of the world is completely legal you might be able to exploit that name for the good of Satanism (better ask your Guardian Demon of it to be sure first). What i mean is you might be able, with hard work also, to achieve high places in government where you can help Satanism cause they will think you are Jew connected or something