MD
Mary Duncan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Summit-County, Ohio
Our Model Tree links this Mary Duncan across the 1920, 1930 and 1940 US Censuses in Summit-County, Ohio (XGBoost, ~Confirmed), with identified parents Lucy & William — first a daughter (b.~1918), then head of a 8-person household.
Age 22
b. ~1918
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Summit-County, Ohio |
| Surname | Duncan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Akron |
| 1935 Residence (County) | Summit |
| Additional Details | |
| Occupation | Waitress |
| Industry | Restaurant |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 710 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Waitress |
| Township / Ward | Akron |
| Est. Birth Year | ~1918 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Duncan | Daughter | — | 22 | ~1918 |
| Milton Duncan | Daughter | — | 9 | ~1931 |
| Vaughn Duncan | Daughter | — | 8 | ~1932 |
| William Duncan | Head | — | 47 | ~1893 |
| Harold Mcintire | Other | — | 22 | ~1918 |
| Thomas Duncan | Son | — | 21 | ~1919 |
| William Duncan | Son | — | 23 | ~1917 |
| Ocie Duncan | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Summit, Ohio
Daughter, age 1
Summit, Ohio · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | West Virginia |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Summit, Ohio
Daughter, age 12
Summit, Ohio · implied b. ~1918 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | West Virginia |
| Mother's Birthplace | West Virginia |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Summit-County, Ohio
Daughter, age 22
Summit-County, Ohio · implied b. ~1918 — 8 household members
| Surname | Duncan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Akron |
| 1935 Residence (County) | Summit |
| Occupation | Waitress |
| Industry | Restaurant |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 710 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Lucy Duncan (~0.92 confidence) and father William Duncan (~0.92 confidence) and mother Ocie Duncan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Lucy Duncan
b. ~1892
Source mother
● Household
· direct · ~0.92
Father
William Duncan
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Ocie Duncan
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Duncan
Daughter · 1940 · age 22 · b. ~1918 · Ohio
★ You are viewing this record
Sibling
Thomas Duncan
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Milton Duncan
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vaughn Duncan
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Duncan
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Summit-County, Ohio
Open full size
1940 US Federal Census — Summit-County, Ohio
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03176-00322)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Loraine Rogers | 4 | Daughter | — | Ohio |
| 2 | Mary Lou Rogers | 2 | Daughter | — | Ohio |
| 3 | Sarah E. Rogers | 74 | Head | — | Ohio |
| 4 | Eula Philpot | 35 | Daughter | Piano Player | Tennessee |
| 5 | John J. Stanley | 57 | Head | Inspector | England |
| 6 | Emma E. Stanley | 57 | Wife | — | Germany |
| 7 | James R. Stanley | 8 | Grandson | — | West Virginia |
| 8 | Jay Barron | 36 | Head | Calender Man | Pennsylvania |
| 9 | Lilian Barron | 33 | Wife | — | Pennsylvania |
| 10 | Shirley Barron | 6 | Daughter | — | Ohio |
| 11 | Roland Barron | 1 | Son | — | Ohio |
| 12 | Charles R. Clarke | 40 | Head | Watch Repair | West Virginia |
| 13 | Jean Clarke | 24 | Wife | — | Virginia |
| 14 | Donna Jean Clarke | 4 | Daughter | — | Ohio |
| 15 | Charles R. Jr. Clarke | 2 | Son | — | Ohio |
| 16 | Fred Miller | 51 | Head | Policeman | Ohio |
| 17 | Helen Miller | 51 | Wife | — | Ohio |
| 18 | Janet Miller | 14 | Daughter | — | Ohio |
| 19 | Jean Miller | 13 | Daughter | — | Ohio |
| 20 | Jane Miller | 9 | Daughter | — | Ohio |
| 21 | William Duncan | 47 | Head | Policeman | West Virginia |
| 22 | Ocie Duncan | 45 | Wife | — | West Virginia |
| 23 | William Jr. Duncan | 23 | Son | Checker | Ohio |
| 24 | Mary Duncan THIS PERSON | 22 | Daughter | Waitress | Ohio |
| 25 | Thomas R. Duncan | 21 | Son | Machine Operator | Ohio |
| 26 | Milton Duncan | 9 | Daughter | — | Ohio |
| 27 | Vaughn L. Duncan | 8 | Daughter | — | Ohio |
| 28 | Harold Mcintire | 22 | Step Son | Truck Driver | West Virginia |
| 29 | Guivy Kelly | 53 | Head | Inspector | West Virginia |
| 30 | Luella Kelly | 53 | Wife | — | West Virginia |
| 31 | Mahala Gainer | 63 | Mother in law | — | West Virginia |
| 32 | R. Earl Foster | 39 | Head | Salesman | Ohio |
| 33 | Isabell Foster | 61 | Wife | — | New York |
| 34 | Ellen Reinhart | 24 | Daughter | — | Ohio |
| 35 | Wilbert Reinhart | 28 | Son in law | Mail Clerk | Ohio |
| 36 | Susanna Nohn | 51 | Head | — | Hungary |
| 37 | Catherine Nohn | 34 | Daughter | — | Ohio |
| 38 | Henry John | 24 | Son | Laborer | Ohio |
| 39 | Ruth John | 12 | Daughter | Laborer | Ohio |
Related Census Records
Pedigree Summary
Mary + 4 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)