Janita, I have Samuel Purviance, son of John, born Castle Finn, Ireland in 1701. He married Lettice Dinsmore and fathered 11 children. There is a items that indicate he came to America with his sons: (1) A meeting held in Philadelphia relating to the formation of the Presbyterian Church there does list the attendence of Samuel Purviance and of Samuel Purvianve, Jr; (2) Samuel, during the early years in this country always signed as Junior, a practice hardly necessary unless distinguishing a father from a son.
Samuel Sr's children were:
Samuel, b.9-24-1728, married 1st Susannah Schley, 2nd Catherine Stewert.
William, b.9-4-1720, d.1787
Robert, b.6-2-1734, d.10-9-1806
John, b.11-30-1742, d.4-21-1817
Samuel Jr's children were:John,b.1772, d.1-4-1773, Lettice,b.1768,d.11-10-1802, never married, Elizabeth Isabella, b.10-16-1780, d.10-4-1832, married 2-20-1811 to Henry Courtenay, widower of her half sister, Isabella. No children. Susanna, b.1772, m.Robert Hughes. 6 children. John, b.1773, never married. Isabella, b.6-4-1779, m. Henry Courtenay, she died 7-8-1804. 3 children. William, believed to have died as an infant. John Henry, never married, died 11-6-1820, buried Washington, D.C. Samuel, no records. Henry, married 6-2-1803 Margaret Ross, died 9-10-1811. James, married 5-5-1801 to Polly Schaffer. Hope this is what you're looking for. I have alittle more on the grandchildren.