Hello! I am also an Acker descendent. My family has recently been researching our family tree. The following information is an excerpt from a letter sent to me by a man in Anderson, SC who works at a historical museum there. Could this be the same William Acker you are researching?
"One of the earliest families in the country was that of Peter Acker.The founder in America was William Acker, who came from Germany about 1750, having started with three sons, one of whom was lost overboard on the voyage.The two left were William Jr., and Peter .They settled in New Jersey, not a great distance from Philadelphia.Of the elder, William, Jr., nothing is known by this southern branch?It is supposed that he lived, died and left his descendants in New Jersey.The other son Peter, with his wife Jane Southerland, moved to Fair Field , SC..In 1790 he moved to the Pendleton District, buying many acres on the Saluda River, near Shady Grove.Peter died about 1815.The children of Peter & Jane were William, who married Miss Clement, Joseph, who married Ruth Alexander, Peter married Susannah Halbert, Alexander married Orma Burton, Mary married James Grace, Nancy married John McDavid, Elizabethmarried James Taylor, Susan married Sanford Vandiver, Amos married Ruth Halbert."