Difference between Come from something and Come of something

come from something—

1. originate from a place:

• The African Elephant is said to be smaller than the Asiatic: yet the largest tusks come from Africa.

2. result from smth.:

• That’s what comes from staying up late with little sleep when cramming for an exam.

come of something—

1. happen to smth.:

• John shudders as he looks down upon what has come of his once great college.

2. = come from something 2:

• That’s what comes of sleeping late, you have a headache all morning.