Stephan's name has 7 letters, so there are $7! = 7 \cdot 6 \cdot 5 \cdot 4 \cdot 3 \cdot 2 \cdot 1 = 5040$ possible rearrangements of his name.
If he can write 12 rearrangements every minute, then in one hour (60 minutes), he can write $12 \cdot 60 = 720$ rearrangements.
Therefore, it will take him $\frac{5040}{720} = \boxed{7}$ hours to write all the possible rearrangements of his name.The answer is: 7
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
If Stephan can write twelve rearrangements of his name every minute, how many hours will it take him to write all the possible rearrangements of his name?

### Answer:
