Joseph Knapp and Family immigration

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I believe Joseph Knapp, wife Elizabeth and one-year old son Jacob arrived in the USA betweem 1827 and 1828, but I have been unable to find a ships manifest with their names on it. They may have arrived from Germany and probably came to a port in New York City. Does anyone have access to embarkation records from German ports or suggestions about finding their arrival dates in the US. They settled in Buffalo, NY by 1828 as their daughter was born there then.

Palaa sivulle “Emigration – Ship Lists ”