I found my Dalsins in MN and Wisconsin. They probably came into the US through New York. I finally hired a researcher in MN and she found my father in 1920 in a John A Dalsin household. John A was Adolph but he changed his name to John. Maybe it was Adolph John but because of WWI he changed it, I do not know for sure. Sorry I could not help. There is a history center in Galveston, I believe.