Peter and Susanna Plankinhorn,who in 1778,were mentioned as "late of Glocester in the province of New Jersey,deceased,"had children,Jacob, John,Peter and Elizabeth.Jacob was married two or three times but left no issue,dying 9-15-1824,in Phila.,in the 93rd year of his age.John was perhaps the same as Hance Plankinhorn,a freeman,assessed in Chester township,Pa.,1760,and the John Plankinhorn,of middletown,1762.He was a distiller in Southwark,Phila.,1778,and married Jane Hart,who d.1808,and he 11-11-1814,aged 82 years.Elizabeth Plankinhorn m.Swedes'Church, Wilmington,6-2-1762,Francis Adams. Peter Plankinhorn,the other brother,changed his name to Plankinton,and m.(by license dated 4-6-1768) Hannah Talkinton,a member of Concord Monthly Meeting,and in 1777 resided in Concord.In 1786 they lived on a rented farm of 100 acres,in Kennet township.Peter m.a 2nd wife,Martha McMinn,and d.about 1808,in Mill Creek Hundred,Del.,leaving children, Samuel,Jesse,Peter,Eli,John,Isabella,m.to Jacob Pierson,Hannah m.to John Boughman,and Ann,of whom three were by the first wife.