Samuel Neill immigrated as a single man in 1864, arriving in Canada's New Brunswick Province with his married brother Joseph and Joseph's young family. The Neills were living in Limavady when they left Ireland for Canada. Their immigration information appears in Brian Mitchell's Irish Passenger Lists 1847-1871: Lists of Passengers Sailing from Londonderry to America on Ships of the J. & J. COOKE Line and the McCORKELL Line (Genealogical Publishing Co., Balto., MD. 1988).
Samuel's brother Joseph was married in Ireland before the family's immigration to the United States: