Oo... this was a tough one... but I think I have found a living relative.
Here's the info on the deceased in my research:
Dorothy was the daughter of Adolph and Olga Berschman.
Aldoph had a sister named Ottile/Tillie Berschman (1897-1970), who married Henry Millat.
They had a son, Henry Millat, who married Dorothy Grass.
They in turn also had a son, Henry Earl (Jr), who, I believe, is alive and was potentially living in/near Detroit, MI in 2005.
I've no idea if that's close enough to be NOK or not?
I checked on Adolph/Tillie's other siblings and struck out:
Helen Berschman married Ted Blaine, but I can find no evidence they had children, and both are deceased.
Ernest Berschman died in 1943, and "Mrs Henry Millat" is the informant on his death certificate, so I'm going to guess he had no closer relatives.
Ida Berschman is in the immigration record with Adolph, Helen and Ottile, but I can find no other record of her.
So help me out here... is this worth reporting to authorities, and if so, what's the next step in sharing this info?