I am also related to this line. My Grandfather was Victor Melbourne Ponninghouse. I am very intereted in any information you have on the Arnst family - especially your message re emigration from Germany to Russia.
Also I am trying to track down the birth plae of Catherina Margereta Hansen in Denmark. I have recently had my DNA done and it has indicated some Sami orgins - I thought Catherina was the most likely ancestor. Any other ideas?