I guess the best would be to find him in lists of passengers, but I do not know of any easy way to do that.
I found this one on Geneanet:http://gw4.geneanet.org/index.php3?b=mfullenwarth&lang=e...
This could be his father. The combination of Jean-Georges seems common in the Alsace region and especially in the Bas-Rhin department.
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