No, not related. Just someone who does lookups for area.
Which of the Liss children are you missing info on?
I will see if I can figure out who John Liss is related to.
Could not locate the passenger ship record for the Liss family coming to the USA - must be between end of November 1890 and 1893 (I think they were listed in Camden city directories then). Do you have the Camden City directory listings for the Liss-Knauer family? Was not successful with locating John Knauer either on passenger ship records.
Also, have you checked Schmukenwalde, Osterode to see if there are perhaps church records available? I could find Osterode but not Schmukenwalde. Perhaps someone on a German message board could locate it.