IGI Individual Record FamilySearch? International Genealogical Index v5.0 British Isles
Samuel Nodwell Male Event(s): Birth:  About 1805 Castledawson, Londonderry, Ireland Parents: Father: William Nodwell Mother: Mary Dawson

May have immigrated to England though he is not named in William's will and Matthew and William jr are which might lead one to believe he had died at an early age.