Resided in Macungie Twp until death

55Isaac is the forefather of almost all of today's Lehigh Co Jarretts, through his sons John and Henry.

Isaac Jarrett (1738-90) served as private in Capt. George Knappen-berger's company, Col. George Breinig's 2d battalion, Northampton County, Pennsylvania militia. He was born and died in Pennsylvania." (DAR)55

Isaac made his will 8 June 1790 stating he was "weak in body" and must have died soon after, as the will was probated in July. He divided the land into two parcels, one going to eldest son John and the other to Daniel.55