O'BRIAN: Brian O'Brian of Berks Co., PA & Cornelius O'Bryan of Rockingham Co., VA & their desc.
O'BRIEN: Historical Memoir of the O'Briens, With notes, appendix, and a genealogical table of their several branches. Compiled from the Irish annatists
O'BRIEN: Pennsylvania O'Briens in Land Records and in Colonial and Revolutionary Wars
O'BRIEN: The O'Briens of Machias, ME. Patriots of the American Revolution, Together with a Sketch of the Clan O'Brien
O'DALY: Hist of the O'Dalys; The Story of the Ancient Irish Sept the Race of Dalach of Corca Adaimh.
O'MEAGHER: Some Historical Notices of the O'Meaghers of Iberrin
O'NEIL: John & Nannie O'Neil Family; Pioneers of Midway, UT
O'ROURKE: An Irish Odyssey: History of the Family O'Rourke
OAKLEAF: Descendants Of Benjamin Peter Oakleaf.
OAKS - OAKES Family Register, Nathaniel Oak of Marlboro, Massachusetts and Three Generations of his descendants
OATLEY: The Oatley Family in America & Their Descendants.
OBERHOLTZER: Genealogical Record of the Descendants of Marton Oberholtzer, with History and Biography
OBERHOLTZER: Some Account of Jacob Oberholtzer Who Settled, About 1719, in Franconia Twp., Montgomery Co., PA & of some descendants
OBERWINDER: Die Familie Oberwinder: Genealogical Encyclopedia of the Family Connections of Richard Maria Wilhelm Oberwinder
Odell Genealogy in the US & Canada (1635-1935); Ten Generations in America. in Direct Line
ODIORNE: Genealogy of the Odiorne Family, with Notices of Other Families Connected Therewith
OGDEN - PRESTON GENEALOGY; Ancestors & descendants of Capt. Benj. Stratton Ogden & his wife Nancy (Preston) Ogden
OGDEN Family in America (Elizabethtown Branch) and Their English Ancestry, John Ogden, the Pilgrim and His Descendants, 1640-1906, Their History, Biography, and Genealogy
OGDEN: Family Historiy in the Line of Lt. Benjamin Ogden of NY (1735-1780) & His Wife, Rachel Westervelt
OGDEN: Ogdens of South Jersey; The descendants of John Ogden of Fairfield, CT & New Fairfield, NJ, b. 1673; d. 1745