James Cooper, of Lancaster, England moved to Mayfield, in the county of Stafford, about 1674, and in 1684, came to Pa, settling in Darby twp.  In the records of Darby Meeting we find the birth of Mary, 9-4-1699, and William 5-11-1701, children of James and Hannah Cooper.  Mary married James Johnson, of New Garden, in 1721, at which time her father was living at "Muscle Cripple" plantation, in New Castle County.  In 1728, James Cooper was an attendant at Kennet Meeting, but nothing further is known of him.  the following may have been his children:

Calvin Cooper's residence was in Lancaster Co, of which he was a commissioner, Justice of the Common Pleas, and several times a representative in Assembly,  His descendants are very numerous in this and other adjoining cos. There were Coopers in Oxford and other twps, who are not supposed to be related to the above.