What are the names of the brother puppies in the book poky little puppy?

Roly-poly, pell mell, and tumble-bumble, but the other was never named which always irritated me.

The true answer to the question about Poky's brothers and sisters names are as follows. Polly, Penny, Pickles, Pat, and of course Poky. They all start with a P, two sisters and two brothers. To confirm this read the book: "The Poky Little Puppy's First Christmas".

The Words roly-poly, pell-mell, and tumble-bumble describes how the puppies go down the hill to get to the Poky little puppy, they are not names.