- [S1035] W.W.I draft registration card.
- [S1037] Inc. The Wyckoff House and Association, The Wyckoff Family in America 3rd Edition (Baltimore, MD.: Gateway Press, 1980). Hereinafter cited as The Wyckoff Family.
- [S1102] Unknown author, Genealogies of Long Island Families.
- [S1103] Greene County Recorded Deed. Hereinafter cited as Greene Co Deed.
- [S1105] California Death Record.
- [S1109] 1920 Marion Co, WV Census.
- [S1133] Greene Co, PA. Estate Records.
- [S1140] 1880 Greene Co, PA. Census.
- [S1250] 1850 Greene Co, PA. Census.
- [S1252] 1870 Greene Co, PA. Census.
- [S1280] 1930 Los Angeles, CA. Census.
- [S1376] Harrison Co, WV. Marriage Register.
- [S1494] 1810 Greene Co, PA. Census.
- [S1639] Waynesburg Messenger, Waynesburg, PA., 27 jul 1863.
- [S1683] Wyckoff Sources of Information VA and MD.
- [S1684] Wyckoff Sources of Information - Greene Co PA.
- [S1871] Jesse Hickman Sources.
- [S1878] CA Marriage Record.
- [S1895] 1880 Calhoun Co, MI. Census.
- [S1909] Mannington, WV. Family Information transcribed by Howard Hickman at Placerville, CA. in 1993 Bible located by Bill Efaw in the back shelf of a closet at 308 or 408 James St, Sine Family Bible Ford McCoy, 604 Darlington Ave, Placerville, CA. 95667.
- [S1913] 1798 PA Direct Tax List.
- [S2059] 1850 Marion Co, VA. Census.
- [S2060] 1860 Marion Co, VA. Census.
- [S2062] Marion Co, WV. Record Book C, p.29.
- [S2099] 1850 Harrison Co, VA. Census.
- [S2100] 1860 Harrison Co, VA. Census.
- [S2101] 1870 Harrison Co, WV. Census.
- [S2102] 1880 Harrison Co, WV. Census.
- [S2242] Calhoun Co, MI. Birth Record.
- [S2245] 1885 SD Census.
- [S2287] California Voter Registrations.
- [S2291] Estle Research by Howard Hickman.
- [S2367] West Viriginia Adjudent General's Papers, WV State Archivles, Charleston, WV.
- [S2958] The American Genealogist.
- [S2961] Fred Sisser III, The Monfoort Family of New York and New Jersey.
- [S2962] The Wyckoff Association, The Wyckoff Bulletin.
- [S2964] Van Voorhees Association Newsletter.
- [S2965] Www.vanvoorhees.org.
- [S3037] Pat Brucer, The Levengood Story.
- [S3650] 1940 San Bernadino Co, CA. Census.
- [S3918] PA Septennial Census.
- [S4090] Morton Wagman, The Rise of Pieter Claussen Wyckoff.
- [S4377] M. William Wykoff, What's is a name? History and Meaning of Wyckoff.
- [S4585] 1880 PA Mortality list.
- [S4767] Salem Post and The Democrat Bulletin.
- [S4818] Marriage Return of James Griffin.
- [S4883] Henry and Sarah Cunningham Bible, possessed by Candy Londono.
- [S5121] Gumbrechtshofen Lutheran Church Records LDS $0770501.
- [S5130] 1800 Allegeny Co, MD. Census.
- [S5167] Harrison Co, WV. Deed Record.