I am looking for the parents of my three-times great-grandfather, David Wilhelm (1816-1905). I have a lead that his mother may have been Elizabeth Wilhelm, who is listed in the 1850 Pennsylvania census as living with a Jacob Wilhelm(possible David's younger brother), but I need to find some more sources to confirm this and hopefully find David's father. I think that immigration records would be key, but I am unsure where to find such records. I have checked Ancestry.com and FamilySearch, but I have been unable to find any Elizabeth Wilhelm on any of the passenger lists that these websites have access to. According to her age in the 1850 census, she would have been born around 1782, although this is a guess, in Germany. If anyone has any ideas about where I could find some more Pennsylvania immigration records or passenger lists, I would really appreciate it!