RD
Robert Duncan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Virginia
Our Model Tree links this Robert Duncan across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Virginia (XGBoost, ~Confirmed), with identified parents George & Andy — first a head (b.~1912), then head of a 5-person household.
Age 28
b. ~1912
Male
Head
Born: Virginia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Virginia |
| Surname | Duncan |
| Given Name | Robert L. Q. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Tenant Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Highest Grade | No 7 |
| 1935 Residence | Virginia |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Occupation | Tenant Farmer |
| Township / Ward | Blacksburg District |
| Est. Birth Year | ~1912 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Shirley Duncan | Daughter | — | 3 | ~1937 |
| Excell Duncan | Spouse | — | 28 | ~1912 |
| Leon Bowers | Other | — | 15 | ~1925 |
| Robert Duncan | Head | — | 28 | ~1912 |
| Cecilla Duncan | Daughter | — | 4 | ~1936 |
Census Appearances
1920
Montgomery, Virginia
Son, age 8
Montgomery, Virginia · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Speaks English | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1930
Montgomery, Virginia
Son, age 19
Montgomery, Virginia · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | Laborer |
| Industry | Gen Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Montgomery-County, Virginia
Head, age 28
Montgomery-County, Virginia · implied b. ~1912 — 5 household members
| Surname | Duncan |
| Given Name | Robert L. Q. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Montgomery |
| Occupation | Tenant Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Highest Grade | No 7 |
| 1935 Residence | Virginia |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
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 Robert Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Duncan (~0.92 confidence) and father Andy Duncan (~0.92 confidence) and mother Mary Duncan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Duncan
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Andy Duncan
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Mary Duncan
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Duncan
Head · 1940 · age 28 · b. ~1912 · Virginia
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Montgomery-County, Virginia
Open full size
1940 US Federal Census — Montgomery-County, Virginia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04277-00261)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Pauline Bland | 9 | Daughter | — | Virginia |
| 42 | Marie Bland | 7 | Daughter | — | Virginia |
| 43 | Raymond Bland | 5 | Son | — | Virginia |
| 44 | Marvin Bland | 2 | Son | — | Virginia |
| 45 | S. Alex Henderson | 39 | Head | Farmer | Virginia |
| 46 | Filla O. Henderson | 38 | Wife | — | Tennessee |
| 47 | Helen M. Henderson | 15 | Daughter | — | Virginia |
| 48 | Mary Ealin Henderson | 13 | Daughter | — | Virginia |
| 49 | Robert Lee Henderson | 11 | Son | — | Virginia |
| 50 | Eldridge D. Caldwell | 49 | Head | Laborer | Virginia |
| 51 | Stella O. Caldwell | 29 | Wife | Housework | Virginia |
| 52 | William Caldwell | 14 | Son | — | Virginia |
| 53 | Robert Caldwell | 12 | Son | — | Virginia |
| 54 | Harry Caldwell | 10 | Son | — | Virginia |
| 55 | Herman Caldwell | 7 | Son | — | Virginia |
| 56 | Ruby May Caldwell | 5 | Daughter | — | Virginia |
| 57 | Ivan Caldwell | 3 | Son | — | Virginia |
| 58 | Pauline Caldwell | 2 | Daughter | — | Virginia |
| 59 | Rosie Caldwell | 0 | Son | — | Virginia |
| 60 | Eli A. Nolen | 61 | Head | Farm Operator | Virginia |
| 61 | Sarah O. Nolen | 59 | Wife | — | South Carolina |
| 62 | Robert L. Q. Duncan THIS PERSON | 28 | Head | Tenant Farmer | Virginia |
| 63 | Excell Duncan | 28 | Wife | — | Virginia |
| 64 | Cecilla J. Duncan | 4 | Daughter | — | Virginia |
| 65 | Shirley Jean Duncan | 3 | Daughter | — | Virginia |
| 66 | Leon Jr. Bowers | 15 | Cousin | Laborer | Virginia |
| 67 | Floyd Nolen | 49 | Head | Farm Laborer | Virginia |
| 68 | Sallie O. Nolen | 49 | Wife | — | Virginia |
| 69 | Ernest Nolen | 18 | Son | Laborer | Virginia |
| 70 | Melva Nolen | 15 | Daughter | — | Virginia |
| 71 | Bernard Nolen | 14 | Son | — | Virginia |
| 72 | Robert Nolen | 12 | Son | — | Virginia |
| 73 | Sylvia May Nolen | 10 | Daughter | — | Virginia |
| 74 | Melvin Nolen | 7 | Son | — | Virginia |
| 75 | Carlyle Cromer | 33 | Head | Tractor Driver | Virginia |
| 76 | Virginia O. Cromer | 32 | Wife | — | Virginia |
| 77 | Billie Cromer | 13 | Son | — | Virginia |
| 78 | Jack Cromer | 10 | Son | — | Virginia |
| 79 | Betty Jane Cromer | 6 | Daughter | — | Virginia |
| 80 | John Cromer | 69 | Father | — | Virginia |
Pedigree Summary
Robert
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)