Yes, I'm Christopher's gg grandson (via Walter and his second wife Helen Swanson).
Christopher's daughter Elizabeth, my father's Aunt "Bee", wrote the following: "The name Castleton was originally Kazenstein - Still a castle in Germany or Austria by that name.Chris' mother was a Baroness - Chris ran away to avoid being drafted in the army - came to America and changed his name to Castleton.Married Louisa Anna Davis.Her side goes back to the Maryion line - Alfred the Great.Woolrich was a family name and still one in the House of Commons."
My father said - late in life - that he descended from the Von Kaltensteins.Having grown up during WWII there was a stigma about being of German descent and it was not something he readily shared.
There are a number of Von Katzensteins and a couple of castles bearing that name.Stein means Stone.Katzen is Cats. Kalten is Cold.Rabbit is Karinchen.To my knowledge there are no Karinchensteins.
How did you make the linkage to Chris having a father named Walter?