‎David K. Duff‏‎ 1) 2), son of Duff and Unknown‏. Born ‎± 1828 at PA‎ 1) Census (‎ 1880 at Cowanshannock Twp., Armstrong Co. PA) United Presbyterian minister. Living with wife, children, servant Callie Jewart, niece F. B. Duff and nephew C. A Duff. 1) Married to: ‎Nancy Henry‏‎ 1) 2) Born ‎± 1841 at PA‎ 1) Census (‎ 1880 at Cowanshannock Twp., Armstrong Co. PA) Living with husband, children, servant Callie Jewart, niece F. B. Duff and nephew C. A Duff. 1) Children: 1. ‎Samuel Calvin "S. C. R. Duff" Duff‏‎ 3) 4) 5) 1) Born ‎ Apr 20, 1872 at Dayton, Armstrong Co. PA‎ 3) 2), died ‎ Feb 19, 1956 at Angola, Erie Co. NY‎, 83 years 6), buried ‎ at Atwood Cemetery, Atwood, Armstrong Co. PA 6) Census (‎ 1880 at Cowanshannock Twp., Armstrong Co. PA) Living with parents, brothers, servant Callie Jewart, cousin F. B. Duff and cousin C. A Duff. 1) Located: (‎ Sep 1895 at Atwood, Armstrong Co. PA) Farmer. 7) Census (‎ 1900 at Atwood, Armstrong Co. PA) Farmer. Living with wife and children. 8) Census (‎ 1910 at Atwood, Armstrong Co. PA) Teamster for a gas company. Living with wife and children. 9) Census (‎ 1920 at Cowanshannock Twp., Armstrong Co. PA) Laborer on a tipple. Living with wife and children. 10) Census (‎ 1930 at Sagamore, Cowanshannock Twp., Armstrong Co. PA) Coal miner. Living with wife and children. 11) Census (‎ 1940 at Hanover Twp., Chautauqua Co. NY) Living with wife, son Denton, and with daughter Bertha Blose and her family. 3) Alt. Death: (‎ Feb 17, 1956) 12) 2. ‎David Duff‏‎ 6) Located: (‎ Feb 1956 at Atwood, Armstrong Co. PA) 6) 3. ‎J. G. Duff‏‎ 1) Born ‎± 1870 at PA‎ 1) Census (‎ 1880 at Cowanshannock Twp., Armstrong Co. PA) Living with parents, brothers, servant Callie Jewart, cousin F. B. Duff and cousin C. A Duff. 1) 4. ‎R. M. Duff‏‎ 1) Born ‎± 1879 at PA‎ 1) Census (‎ 1880 at Cowanshannock Twp., Armstrong Co. PA) Living with parents, brothers, servant Callie Jewart, cousin F. B. Duff and cousin C. A Duff. 1)

Sources

1) source: 1880 U.S. Census Population Schedule, Cowanshannock Twp., Armstrong Co. PA, page: ED 4, Sheet 100-C, Dwelling 342, Family 353, D. K. Duff Family
2) source: Social Security Applications and Claims Index, extra text: Name: Samuel Calvin Duff
Gender: Male
Race: White
Birth Date: 20 Apr 1872
Birth Place: Dayton Armst, Pennsylvania
Father: David K Duff
Mother: Nancy Henry
SSN: 169011925
Notes: Dec 1936: Name listed as SAMUEL CALVIN DUFF, page: Entry for Samuel Calvin Duff
3) source: 1940 U.S. Census Population Schedule, Hanover Twp., Chautauqua Co. NY, page: ED 7-61, Sheet 8-B, Household 183, James Blose Family
4) source: Birth Certificate of Bertha Estella Duff
5) source: Birth Certificate of Laura May Duff
6) source: Obituary of Samuel C. Duff
7) source: Marriage License and Certificate of Samuel C. Duff and Daisy M. Hall
8) source: 1900 U.S. Census Population Schedule, Cowanshannock Twp. (South Division), Armstrong Co. PA, page: ED 2, Sheet 2-A, Dwelling 31, Family 33, Samuel C. Duff Family
9) source: 1910 U.S. Census Population Schedule, Atwood, Armstrong Co. PA, page: ED 9, Sheet 8-B, Dwelling 15, Family 16, Samuel C. Duff Family
10) source: 1920 U.S. Census Population Schedule, Cowanshannock Twp. (Sagamore District), Armstrong Co. PA, page: ED 4, Sheet 7-A, Dwelling 120, Family 120, Samuel C. Duff Family
11) source: 1930 U.S. Census Population Schedule, Cowanshannock Twp., Armstrong Co. PA, page: ED 3-12, Sheets 5-B and 6-A, Dwelling 98, Family 100, Samuel C. Duff Family
12) source: Mrs. Daisy Duff Funeral

Citation for: Family Page
"Family Page: David K. Duff & Nancy Henry." HuMo-genealogy - A Rural Valley and Cowanshannock Family Tree (http://www.ruralvalleyhistory.com/family.php?tree_id=37&id=F5723&main_person=I15979 : accessed 04 October 2025) David K. Duff #I15979, born ‎± 1828 at PA