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Thomas Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Richmond-City-County, Virginia
Our Model Tree links this Thomas Duffy across the 1920, 1930 and 1940 US Censuses in Richmond-City-County, Virginia (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1909), then head of a 5-person household.
Age 31
b. ~1909
Male
Son
Born: Virginia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Richmond-City-County, Virginia |
| Surname | Duffy |
| Given Name | Thomas M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Richmond |
| 1935 Residence (County) | Richmond City |
| Additional Details | |
| Occupation | Radio patrolman |
| Industry | City police department |
| Class of Worker | GW |
| Hours Worked | 56 |
| Income (1939) | 1800 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Occupation | Radio Patrolman |
| Township / Ward | Richmond |
| Est. Birth Year | ~1909 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Lurie Duffy | Spouse | — | 54 | ~1886 |
| John Duffy | Head | — | 61 | ~1879 |
| Thomas Duffy | Son | — | 31 | ~1909 |
| John Duffy | Son | — | 28 | ~1912 |
| Jane Duffy | Daughter | — | 22 | ~1918 |
Census Appearances
1920
Henrico, Virginia
Son, age 10
Henrico, Virginia · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Thomas M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1930
Henrico, Virginia
Son, age 21
Henrico, Virginia · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | Clerk |
| Industry | Electric Power |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Richmond-City-County, Virginia
Son, age 31
Richmond-City-County, Virginia · implied b. ~1909 — 5 household members
| Surname | Duffy |
| Given Name | Thomas M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Richmond |
| 1935 Residence (County) | Richmond City |
| Occupation | Radio patrolman |
| Industry | City police department |
| Class of Worker | GW |
| Hours Worked | 56 |
| Income (1939) | 1800 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 Thomas Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Duffy (~0.92 confidence) and father John Duffy (~0.92 confidence) and father John Duffy (~0.92 confidence) and mother Anna Duffy (~0.92 confidence) and mother Grace Duffy (~0.92 confidence) and mother Lurie Duffy (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Duffy
b. ~1880
Source father
● Household
· direct · ~0.92
Father
John Duffy
b. ~1883
Source father
● Household
· direct · ~0.92
Father
John Duffy
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Anna Duffy
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Grace Duffy
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Lurie Duffy
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Duffy
Son · 1940 · age 31 · b. ~1909 · Virginia
★ You are viewing this record
Sibling
Jane Duffy
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Duffy
Sibling · 1940 · age 28
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 — Richmond-City-County, Virginia
Open full size
1940 US Federal Census — Richmond-City-County, Virginia
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-04319-00305)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Floyd E. Taylor | 66 | Head | Carpenter | Virginia |
| 42 | Georgia E. Taylor | 60 | Wife | — | Virginia |
| 43 | Russell T. Wilbird | 35 | Head | Life Insurance Agent | Virginia |
| 44 | Louise S. Wilbird | 35 | Wife | — | Virginia |
| 45 | John P. Jr. Bradshaw | 26 | Head | Traveling Salesman | Virginia |
| 46 | Lula B. Bradshaw | 30 | Wife | Stenographer | Virginia |
| 47 | James O. Witt | 49 | Head | Boilermaker | Virginia |
| 48 | Lottie A. Witt | 45 | Wife | — | Virginia |
| 49 | Otto Church | 30 | Head | Mechanic | North Carolina |
| 50 | Della Church | 25 | Wife | Seamstress | North Carolina |
| 51 | Norwood E. Scott | 24 | Head | Bookkeeper | North Carolina |
| 52 | Dorothy S. Scott | 19 | Wife | Saleswoman | North Carolina |
| 53 | John T. Duffy | 61 | Head | Manager | Virginia |
| 54 | Lurie M. Duffy | 54 | Wife | — | Virginia |
| 55 | Thomas M. Duffy THIS PERSON | 31 | Son | Radio Patrolman | Virginia |
| 56 | John T. Jr. Duffy | 28 | Son | — | Virginia |
| 57 | Jane L. Duffy | 22 | Daughter | Stenographer | Virginia |
| 59 | William H. Hall | 49 | Head | Chief Clerk | Virginia |
| 60 | Charlotte C. Hall | 39 | Wife | — | Virginia |
| 61 | Margaret B. Hall | 9 | Daughter | — | Virginia |
| 62 | Milton Pugh | 51 | Head | Conductor | Virginia |
| 63 | Elizabeth K. Pugh | 30 | Wife | — | North Carolina |
| 64 | William Edgerton | 36 | Head | Business Manager | Virginia |
| 65 | Louise W. Edgerton | 30 | Wife | — | Virginia |
| 66 | William J. Edgerton | 2 | Son | — | Virginia |
| 67 | Frances Valenta | 24 | Nurse | Nurse | Virginia |
| 68 | Henry G. Shirkey | 48 | Head | Pharmacist | Virginia |
| 69 | Mattie T. Shirkey | 46 | Wife | — | Virginia |
| 70 | Frances D. Shirkey | 16 | Daughter | — | Virginia |
| 71 | Walter B. Shirkey | 6 | Son | — | Virginia |
| 72 | Robert P. Jr. Hackney | 38 | Lodger | Chemist | North Carolina |
| 73 | James Belton | 59 | Head | Assistant Director | Virginia |
| 74 | Sallie P. Belton | 41 | Wife | — | Virginia |
| 75 | James J. Belton | 14 | Son | — | Virginia |
| 76 | William P. Belton | 13 | Son | — | Virginia |
| 77 | William S. Bremble | 37 | Head | Attorney | Virginia |
| 78 | Frances H. Bremble | 34 | Wife | — | Virginia |
| 79 | Elizabeth S. Bremble | 5 | Daughter | — | Virginia |
| 80 | Gertrude Moody | 20 | Servant | Maid | Virginia |
Pedigree Summary
Thomas + 2 siblings
Gen 1 · 6 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)