I have the book called Alexander Family records by S A Perry. All it has in it is; John Alexander b. 1700 from scotland, 1736,settled at W. Nottinghan, Chester,Co., PA; m. 1722 Margaret Glasson.
James Alexander 1726-91, of Chambersburg, Pa; removed to Kishacoquillas Valley, Pa., 1755; served in Capt. Alexander Peoples' Co., 1st Bn., Cumberland Co. Militia 1777, for which service he received 1600 acres of land located in Clearfield Co., Pz; m. Rosey Reed d. 1792.