Have no idea if they were the first named PARKE to emigrate to Chester Co PA, but my Rachel PARKE b 11 Nov 1698 (probably County Carlow, Ireland) was daughter of Thomas & Rebecca (WARD) PARKE who emigrated to America in 1724. Rachel PARKE married my ancestor William ROBINSON, son of William & Elizabeth (BAKER) ROBINSON. The son of William & Rachel ROBINSON, Thomas ROBINSON, married Sarah COATES [daughter of Moses & Priscilla (HUTCHINSON) COATES]. Thomas & Sarah both died in Chester Co PA. I have other information on Rachel PARKE if she seems to be connected with your PARKE family. My source is James Gregory ROBINSON. I have his sources of records if you want them.