Duke of Zhou gossip fortune-telling formula

Does Duke Zhou have anything to do with gossip and the Book of Changes? Why do you often look at the name of Duke Zhou together with Fuxi, King Wen and Confucius?

Of course it matters. Duke Zhou is Zhou Wenwang's younger brother Zhou Gongdan.

Zhou Wenwang explained the acquired gossip, so it was also called Zhouyi, which made great contributions to the study of Zhouyi.

Zhouyi can't be the achievement of one person but the crystallization of collective wisdom, and Duke Zhou is definitely one of them.

Besides, isn't there a Duke of Zhou left in the later generations?

So ... . . . .