1.  John B. Linn & William H. Egle, eds.  1880. Record of Pennsylvania Marriages Prior to 1810.  Pennsylvania Archives, 2nd Ser.  Lane S. Hart, State Printer, Harrisburg, PA (online at GenealogyLibrary.com).  Vol. IX, p. 256:

Marriages Authorized by the Buckingham Monthly Meeting of Friends. 1730--1810. Buckingham Monthly Meeting...
11, 21, 1764	Ely, Hugh, and Elizabeth Wilson.
9, 11, 1793	Ely, Sarah, and Samuel Smith.

2.  Reuben P. Ely, Warren S. Ely, and Daniel B. Ely.  1910. An Historical Narrative of the Ely, Revell, and Stacye Families.  Fleming H. Revell, Co., New York (online at GenealogyLibrary.com).

p. 282

(33) HUGH ELY, youngest son of Joshua and Elizabeth (Bell) Ely, born in Solebury, August 8, 1741, married, November 21, 1764, Elizabeth Wilson of Buckingham, born October 6, 1739, daughter of Samuel and Rebecca (Canby) Wilson, and settled on the farm purchased by his father in that year of the attorneys of Richard Pike, adjoining the homestead on the south; inherited it under his father's will in 1783, and lived thereon until his death, devising it to his son John, who sold it in 1822 to his cousin Asher Ely, from whom it descended to Holcombe Ely, and passed out of the family in 1864. Hugh Ely died April 22, 1804.

p. 283

Children of Hugh and Elizabeth (Wilson) Ely:--  139.  Rebecca Ely, born August 25, 1765; died October 8, 1802; married John Stockdale.  140.  Sarah Ely, born May 2, 1768; married, 1793, Samuel Smith.  141.  Hannah Ely, born June 30, 1771; died January 3, 1823; married Samuel Harrold.  141a. John Ely, born December 19, 1773; died January 31, 1778.  142.  John Ely, born April 9, 1778; died July 28, 1826; married Rachel Hartley, November 11, 1801.

3.  LDS.  Family Search: Internet Genealogy Service: Ancestral File.