I do find the O'Flyng's in the Waldo Lincoln Books.The entry reads,in part:
Margaret-Roxana, daughter of Jeduthan Gray (Shubael, Shubael, Edward, John, Cornelius) Waldo and Nancy-Rosanna Waldo; born October 21, 1831, living 1838 at Woodward,Ia.She married (1), April 1, 1850 at Clinton,Ill., Henry, son of Reuben and Anna (Penn) Thornley of cincinnnatti,O.; born Nov., 3, 1827, at Cincinnati; died Feb. 10, 1853, at Xenia, Ia.....She married (2) October 10, 1860 William-Henry, son of William-Holmes and Frances (Marion) Harlow of Woodward; born Dec. 4, 1838, at New York City; died May 28, 1891, at Woodward.He was a farmer.Their children were:
1. Nancy-Bell, born August 24, 1864 at Woodward Ia.
2.Mary, born Nov3, 1867; married December 30, 1895 at Woodward, Ia., IVL, SON OF REV. J.M. AND RACHEL (TAYLOR) O'FLYNG of Benton,Ia; born March 11, 1862 at Greenfield, Ind., They were living 1899 at Woodward.They have no children
These are the only references I can find to the O'Flyng's in the books.If you would like a copy of this page, I can send you one.Hope this helps.