Unless a related German family member responds (which is possible but not probable), you will need to submit a request to the local parish asking for such info or hire a local researcher to conduct your research.
I presume you know that the name of the town is not as it appears on the passenger list, i.e. Schönefeld rather I believe it is the town of Schenefeld in Holstein which is just to the North of Hamburg.
Depending on whether the family was catholic or protestant, you will wish to send your inquiry to the appropriate church.
Best of luck,