Tilghman Mertz, the father of Joseph N. was a miller by trade and for anumber of years operated Kern's mill at Kernsville and subsequently engaged in farming. In 1868 his wife Catharine Gross died leaving no issue. Five years later he was married to Amanda Sell and removed to Saegersville where he resided until his death His later years were spent looking after his three farms. He was one of North Whitehall's prosperous and influential citizens. He was a director in the Second National Bank of Allentown and a devoted member of the Jordan Reformed congregation, serving many years as deacon. To him and his second wife were born two children: Joseph N. and Lizzie the wife of Morris Miller, Allentown, PA.