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:

• William Cooper, of Kennet, married 8-18-1732, Mary Miller, dau of Samuel nd Margaret, of Sadsbury, by whom he had children - Wm, Calvin, Robert and perhaps others.  Robert was a justice of the Common Pleas prior to 1790.  Wm Jr, like his father was a fuller, and lived for a time in Coventry and Tredyffrin twps.

• Hanna Cooper, of Kennet, married 1-8-1738, John Clark, of West Marlborough, afterwards of Sadsbury, Lancaster Co.

• Cavin Cooper was a taxable in Birmingham in 1732, and in 1734 was  one of the overseers of the poor for that twp.  About that time he purchased a tract of land on the Octarara, at or near the site of Christiana, where he erected a mill.  He was a fuller.  He died 9-1-1779.  HIs first wife was Phebe, dau of Samuel Hall, of Kennet....m 4-29-1732; she died 6-18-1757 and a y4ar later he married a widow, Elizabeth Jefferis.  His children were :
  • William  b  9-5-1734 d. 2-20-1821 m 12-5-1759 Elizabeth Pyle, dau John and Rachel, of Kennet.  They settled in West Bradford, at a fulling mill late belonging to Daniel Temple

  • George 2-28-1737 d. 1-14-1820 m 10-15-1761 Susanna, dau of Thomas and Ann Truman of Sadsbury - 2nd m 5-24-1787 to Hannah Dixson.

  • John b 12-9-1739 d 2-15-1811 , 10-24-1764 Rebecca Moore, dau of James and Ann, of Sadsbury.

  • Hannah b 10-3-1742 died young

  • Mary b 12-17-1744 d 9-18-1806 m 3-24-1773 to John Dixson, and 11-28-1781 to James Phillips of Hockessin

  • James b 2-14-1747 , m. 11-8-1775 Rachel, dau of Andrew and Rebecca Moore, of Sadsbury ...he married a second wife, Catharine Powell, and moved to Northumberland Co, PA

  • Phebe b 6-6-1750 probably died young.

  • Sarah b 12-12-1753 m to Thomas Dixson

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.