ENGERS and AAREN (FROMET) families from Altona Germany and WinschotenNetherlands

Kann hier jemand weiterhelfen?
Gruß Peter Drygalla

Dear List Members

I am looking for documents related to my great grandfather Aaron (aka Adolph Marcus) ENGERS born on 18 January 1850 in Altona. His sister Sara ENGERS was born on 9 October 1847 also in Altona. He served in the Prussian army in the Alsace in 1870. He married a woman named Helene ???. His Father was Markus ENGERS born on 7 march, 1816 in Winschoten Netherlands, where he married on 16 december 1841 Fanny AAREN (FROMMET) born in Altona in 1816. Fanny's parents were Simon AARON FROMMET and Meik GOTTLEIB. My Grandfather Martin ENGERS was born in Altona on 10 November, 1880.
any suggestions where and how to look would be most welcome.
thank you
Howard Engers
Geneva, Switzerland