929.1 O : The Daniel O'Conors of New York : with historical, religious, and social context; consideration of their Irish origins; and notes on the Rev. J. F. X. O'Conor, S. J. and Rev. John S. O'Conor, S. J / John C. O'Conor.
929.1 P : Genealogy for beginners / Katherine Pennavaria.
929.1 R : The family tree problem solver : proven methods for scaling the inevitable brick wall / Marsha Hoffman Rising.