RH
Robert Hart — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Robert Hart across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Robert & Margaret — first a head (b.~1892), then head of a 3-person household.
Age 48
b. ~1892
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Hart |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Waltham City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Finisher |
| Industry | Watch factory |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1000 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Finisher |
| Township / Ward | Waltham City |
| Est. Birth Year | ~1892 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Hart | Head | — | 48 | ~1892 |
| Margaret Hart | Spouse | — | 49 | ~1891 |
| Margaret Hart | Daughter | — | 13 | ~1927 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 27
Middlesex, Massachusetts · implied b. ~1893 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Watchmaker |
| Industry | Watch Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Head, age 37
Middlesex, Massachusetts · implied b. ~1893 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 24 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Watch Maker |
| Industry | Watch Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25.00 |
| Radio Set | R |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 48
Middlesex-County, Massachusetts · implied b. ~1892 — 3 household members
| Surname | Hart |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Waltham City |
| 1935 Residence (County) | Middlesex |
| Occupation | Finisher |
| Industry | Watch factory |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1000 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Hart across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Hart (~0.92 confidence) and mother Margaret Hart (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Hart
b. ~1859
Source father
● Household
· direct · ~0.92
Mother
Margaret Hart
b. ~1864
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Hart
Head · 1940 · age 48 · b. ~1892 · Massachusetts
★ 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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01619-00846)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Kenneth Doucet | 68 | Lodger | Laborer | Canada Fr |
| 2 | Marie Doucet | 50 | Lodger | — | Canada Fr |
| 3 | Catherine Doucet | 64 | Lodger | Dish Washer | Canada Fr |
| 4 | Louis B Charron | 59 | Head | Foreman | Canada Fr |
| 5 | Julia Charron | 57 | Wife | — | Massachusetts |
| 6 | Catherine Villavosh | 64 | Head | — | Canada Eng |
| 7 | Mary Hapernay | 33 | Daughter | Machine Operator | Massachusetts |
| 8 | James O Chruson | 32 | Head | Trimmer | Canada Fr |
| 9 | Gladys E Chruson | 24 | Wife | Over-Coiler | New Hampshire |
| 10 | William Smith | 27 | Head | Truck Driver | Massachusetts |
| 11 | Marie A Smith | 27 | Wife | — | Massachusetts |
| 12 | William M Smith | 2 | Son | — | Massachusetts |
| 13 | Patricia A Smith | 1 | Daughter | — | Massachusetts |
| 14 | Melvina Hills | 50 | Head | — | New York |
| 15 | Mary J Hills | 87 | Mother | — | New York |
| 16 | Mary Carroll | 60 | Head | — | Scotland |
| 17 | Edward Carroll | 36 | Son | Chief Clerk | Massachusetts |
| 18 | John Carroll | 20 | Son | Buffer | Massachusetts |
| 19 | Robert Hart THIS PERSON | 48 | Head | Finisher | Massachusetts |
| 20 | Margaret Hart | 49 | Wife | — | Eire |
| 21 | Margaret Hart | 13 | Daughter | — | Massachusetts |
| 22 | Willard Landry | 31 | Head | Dredge Operator | Canada Eng |
| 23 | Helen Landry | 26 | Wife | — | Massachusetts |
| 24 | Marie Landry | 4 | Daughter | — | Massachusetts |
| 25 | Theresa Landry | 3 | Daughter | — | Massachusetts |
| 26 | Mary Landry | 1 | Daughter | — | Massachusetts |
| 27 | William Leonard | 52 | Head | Laborer | Massachusetts |
| 28 | Marie C Leonard | 40 | Wife | — | Massachusetts |
| 29 | Raymond Leonard | 27 | Son | Hair Spring Adjuster | Massachusetts |
| 30 | Bridget Hayes | 60 | Head | — | Eire |
| 31 | Sabina Connell | 68 | Lodger | — | Canada Eng |
| 32 | Thomas Mcadams | 63 | Lodger | — | Eire |
| 33 | Emma Pictou | 57 | Head | — | Canada Fr |
| 34 | John Pictou | 24 | Son | Machine Operator | Massachusetts |
| 35 | Mary Pictou | 22 | Daughter-in-law | Clerical | Massachusetts |
| 36 | Michael Mullhall | 67 | Lodger | Manager | Eire |
| 37 | Bordelon Samuel H | 29 | Head | 26 | Louisiana |
| 38 | Dorothy Samuel H | 30 | Wife | — | Massachusetts |
| 39 | Sonja Samuel H | 2 | Daughter | — | Massachusetts |
| 40 | Salvatore Demarcuso | 47 | Head | Laborer | Italy |
Pedigree Summary
Robert
Gen 1 · 2 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)