Family Tree - paternal grandfather (5 generations)

This is my paternal grandfather Ernie Zaun's family tree.  Part of this tree doesn't go back very far because my 2X great grandfather John Adam Zaun came straight from Germany. I know where he was born, but cannot identify his parents.  My burning question to him would be, why would you come to a new country at a time when it is embroiled in a Civil War?  My 2X great grandmother Elizabeth Wellner came over from Germany with her parents on the same ship with Adam Zaun.  I found them on an immigrant passenger list, but that is all I know about them.  My great grandmother Georgia Powell ("Nanny") came from an illustrious New England lineage which includes a Governor of Connecticut and First Settlers of Hartford.  I can trace her ancestry back to the earliest colonial days in the Judd and Bradley families.

My grandfather Ernie's paternal side was from Germany as I mentioned. His mother Georgia's paternal side was from Ireland and England; her maternal side was from England and Scotland.  There are previous posts telling the stories of George James Powell, Mary Louise Judd, Orrin Bishop Judd, and Elizabeth MacDonald.