Errors in writing, voluntary changes by the bearers, modifications for language reasons... There are many reasons why the surname Chuchim may have undergone changes or modifications, and from those modifications, surnames similar to Chuchim may have appeared, as we can see.
Discerning whether the surname Chuchim or any of the surnames similar to Chuchim came first is not always easy. There are many reasons that could have led to the surname Chuchim being written or pronounced differently, giving rise to a new, different surname Chuchim with a common root.