A biography of Cornelius C. O'Keeffe is included in "Progressive Men of the State of Montana". Parents: David and Mary (Carroll) O'Keeffe.In Sep 1865, Blackfoot City, MT, Cornelius married Miss Annie Lester, who was born near Cashel, County Tipperary, IR, the daughter of Richard Lester. Annie came to the US in 1835.O'Keeffe children: Mary (Mrs. Kenneth Ross), Margaret. Cornelius died Mar 1883. Annie died 4 Jul 1890.
David O'Keeffe, younger brother of Cornelius, was born 1837, County Cork, IR (near Blarney Castle). He imm. 11854 to New York. 1859 to California, then Washington. He came to Montana in Jun 1862.