- Birth Date
- 17 June 1848
- Death Date
- 27 September 1937
His obituary gives his middle initial as "E," but his death certificate gives no middle name. A family history written by his daughter provides information regarding his birth on the trail.
- Age at Departure: Infant
- Born en Route
- 1850 Utah Census.
- Clayson, Myrtle M., "History of William McEwan, Husband of Mary Ellen Haws," in The official magazine of the Isaac Higbee and Sophia Somers Family Organization (Provo, Utah: Isaac Higbee and Sophia Somers Family Organization, 1955-1958), vol. 3: 62.
- Historical Department journal history of the Church, 1896-2001, 24 September 1848, 17-54.
- Journal History of The Church of Jesus Christ of Latter-day Saints, 24 September 1848, 31.
- Journal History of The Church of Jesus Christ of Latter-day Saints, Supplement after 31 December 1848, 14.
- "William E. McEwan," Deseret News , 29 Sep. 1937, 18.