I really really don't support that the idea of finding God's name on an egg would make you believe.
But, I do believe in the idea of making someone believe using the Bible, Qur'an, or the Torah.
Stuff that are said in the Qur'an like, how it feels like in space, what stars look like when they explode, layers of the atmosphere.
All these and more are mentioned in the Qur'an(keeping in mind that that was more than thousands of years ago.).
That would make me believe.
Not god's name on an egg.
"Religions are, by definition, metaphors, after all: God is a dream, a hope, a woman, an ironist, a father, a city, a house of many rooms, a watchmaker who left his prize chronometer in the desert, someone who loves you—even, perhaps, against all evidence, a celestial being whose only interest is to make sure your football team, army, business, or marriage thrives, prospers, and triumphs over all opposition. Religions are places to stand and look and act, vantage points from which to view the world. So none of this is happening. Such things could not occur. Never a word of it is literally true.”