"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M4ZZ-R1R : accessed 21 April 2016), William Duncan, Hopewell, York, Pennsylvania, United States; citing family 126, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
↑ "Pennsylvania Births and Christenings, 1709-1950," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:V2V7-Y46 : accessed 21 April 2016), Charles Duncan, 31 Aug 1821; Christening, citing HOPEWELL CONGREGATION,HOPEWELL TWP,YORK,PENNSYLVANIA; FHL microfilm Q974.841 Y1 V2YR.
↑ (Descendants of Andrew Duncan - Chestnut Level PA Family History) The Duncan and Gibson families by Duncan, Hugh Welch, 1852-Published 1905; Digitized by Internet Archives in 2009 ; funding from Allen County Public Library Genealogy Center
Mary Ann Duncan Dobson "Duncan Research Files" (Consolidated, sourced and acknowledged); and the many Duncan Researchers that have provided information. The Genealogy Bug
Thank you to Terry Duncan for creating WikiTree profile Merritt-777 through the import of J Duncan.ged on Apr 12, 2013.
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