I am researching the descendants of William BLAIR, b. 15 May 1734 in Londonderry, Rockingham, NH, son of John and Jennet (McCloud) Blair, who married 8 Dec 1768 in New Boston, Hillsborough, NH, Rosanna GREGG, b. 1744 in Londonderry, daughter of Hugh and Sarah (Leslie) Gregg. Their issue: 10 children, among them named Hugh, Jean, Sarah, Rosanna. Thank you for your help. Rob Gregg