SCHRODER SCHROEDR of Polkritz, Magdeburg, Prussia in 1799 [Schwarzholz, Altmark]

I am seeking information on my g.g.g. grandfather and his family:

Andreas Heinrich Christian Schroder
born 17 August 1799 in Village of (Kirch) Polkritz, Magdeburg, Prussia
[Schwarzholz, Altmark, Sachsen-Anhalt today],
departed the port of Bremen, Hanover, Prussia on 3 October 1847
on the sailing vessel, Alexander von Humboldt
arrived in New Orleans, USA on 11 November 1847

Dorthea Elizabeth Eitz, his wife
born 13 December 1811 in Friedrichsfluess, Altmark, Prussia
departed the port of Bremen, Hanover, Prussia on 3 October 1847
on the sailing vessel, Alexander von Humboldt
arrived in New Orleans, USA on 11 November 1847

Louis Christian Schroeder, their son
born 10 January 1839 near Mossburg, Prussia
departed the port of Bremen, Hanover, Prussia on 3 October 1847
on the sailing vessel, Alexander von Humboldt
arrived in New Orleans, USA on 11 November 1847

I am interested to confirm the data above as well as the following

1. Andreas' family....
a. names of brothers, sisters, parents
b. birth dates and places
c. marriage dates and places
d. death dates and places

2. Andreas' family line and history as far back as possible

Sincerely,

Daniel Schroeder