I am a great-grand-son of Philip Kreis. My grandfather Frederick E. Kreiss added the second "s" to his name during the first world war. I have a copy of his book and have spent considerable time, and some money trying to confirm his story. It is likely a fabrication. His wife was denighed a pension.
He had only two grandsons with the Kreis/Kreiss surname. I'm the last great-grandson, and have no male children. Being 79, I'm not expecting any more. His male line will end here.
Please feel free to reply.