My records indicate that JOHN Jacob Eckman was the son of John Jacob Eckman born January 1, 1757 Lancaster County, Pennsylvania died sometime after 1784 and Catherine Foutz born Aril 26, 1757 in Lancaster County, Pennsylvania died September 19, 1823 They were married November 13 1782 in Trinity Lutheran Chruch, Lancaster
I show them having 5 children Susanna Eckman, Elizabeth Eckman, Marie Eckman, John Eckman, who married Susanna Groff and John Jacob Eckman
The parents of John Eckman and grandparents of your John Jacob Eckman were Jerome Hieronimus/Eronimus Eckman born March 2, 1718/1719 Waldorf, Pfalz. Bayern, Germany died April 22, 1784 Lanc. Co., Pa. and Anna Barbara Slaymaker born February 26, 1725/26 Strasburg Twp., Chester County, Pennsylvania (Later Lancaster County) died August 19, 1796 Bart Twp., Lanc. Co., Pa. They were married October 16, 1744 New Holland, Lanc. Co., Pa. Anna Barbara Slaymaker was the daughter of Mathias Slaymaker.