↑ Collections of the Holland Society of New York, Vol. 3. Records of the Reformed Dutch Church of New Paltz, NY. (Ithaca, NY: Cornell University Library, 2015), p. 219
↑ "New York Marriages, 1686-1980," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F64G-JLV : 12 December 2014), Isaac Terwiliger and Eliza Branan, 12 Feb 1831; citing reference ; FHL microfilm 529,191.
↑ "United States Census, 1840," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHTJ-C9S : 16 August 2017), Isaac Terwilleger, Marlboro, Ulster, New York, United States; citing p. 53, NARA microfilm publication M704, (Washington D.C.: National Archives and Records Administration, n.d.), roll 346; FHL microfilm 17,208.
↑ "United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MC11-L93 : 12 April 2016), Isaac Terwilliger, Marlborough, Ulster, New York, United States; citing family 421, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).