Sometimes before the entire family arrived in a new country, one or two family members (usually men and usually single, but not always) would immigrate first, get established, and then send back for the rest of the family. If you’ve found the “family’s passenger list entry,” consider searching for a brother or other male relative who might have immigrated first. Peter Freund and Peter Hornung immigrated in 1853, followed by Freund’s siblings and extended family along with Hornung’s wife or sister a few years later. 
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