Which rabbits out of Sandleford's rabbits left with fiver's group in Watership Down?

In "Watership Down," the rabbits from Sandleford that leave with Fiver's group include Hazel, Fiver, and his brother, Bigwig. They are joined by other rabbits like Dandelion, Pipkin, and Blackberry as they seek a new home away from the dangers of their original warren. Each character brings unique traits and skills that aid their survival and journey.