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.  

New Haven, Connecticut

I have traced several branches of our family tree back to New Haven during colonial times.

Capt. Daniel Hall, my maternal 7th great grandfather, lived in nearby Wallingford with his wife Thankful Lyman from Middletown, CT.  Abraham Hall, my 6th great grandfather, lived in New Haven with his wife, Sarah Doolittle. Abraham is buried in Center Street Cemetery, Wallingford, which is close to Doolittle Park.

Capt. Daniel Hall > Abraham Hall > Medad Hall > Elisha Hall > Alfred King Hall > Andrew A. Hall > Ada C. Hall > Horace C. Crofford > Virginia M. Crofford > Teresa Zaun Austin

John Hopkins, my 7th great grandfather (maternal), operated a grist mill in New Haven built by his father Stephen Hopkins of Hartford.

Lt. John Hopkins > Mary Hopkins > Abraham Hickcox > Jared Hickcox > Hannah Hickcox > Anna Dillingham > Horace C. Crofford > Horace C. Crofford > Virginia M. Crofford > Teresa Zaun Austin

Some of our ancestors, both maternal and paternal, are buried in a famous graveyard on what is now called, "Center Church on the Green."  The original cemetery is gone, but many of the gravestones are preserved underneath the church building.
http://www.newhavencenterchurch.org/history.html

I will add the names of our ancestors buried there as I discover them.

From my maternal grandfather's lineage:

Eleazer Brown 1642 - 1714 (my 8th great grandfather)

Sarah Buckley Brown 1640-1723 (my 8th great grandmother)

From my paternal grandfather's lineage:

Nathaniel Bradley 1661-1745 (my 7th great grandfather)

Ruth Dickerman Bradley 1668-1725 (my 7th great grandmother)

Alice Prichard Bradley 1625-1692 (my 8th great grandmother)