Historically, there have been bow holds that were supinated, with the hand under the bow instead of on top of it. But the bows also had a different shape in the past. There are a few different acceptable ways to hold the modern bow, but all of them are with the wrist pronated.
If you have additional questions about bow holds and are actually learning to play the violin, I suggest asking them within the context of a private lesson, so your teacher can make sure that you are understanding the answers to your questions. In general, violin technique is better explained by demonstrations rather than descriptions.