RC
Robert Carr — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Robert Carr across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Arthur & Jesse — first a son (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Carr |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Chauffeur |
| Industry | Private Family |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 720 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Chauffeur |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1915 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Jesse Carr | Head | — | 50 | ~1890 |
| Catherine Vassar | Other | — | 72 | ~1868 |
| Paul Carr | Son | — | 20 | ~1920 |
| Robert Carr | Son | — | 25 | ~1915 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 4
Middlesex, Massachusetts · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carr |
| Given Name | Robert J |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | England |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 14
Middlesex, Massachusetts · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carr |
| Given Name | Robert T |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 25
Middlesex-County, Massachusetts · implied b. ~1915 — 4 household members
| Surname | Carr |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Occupation | Chauffeur |
| Industry | Private Family |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 720 |
| Highest Grade | Hs 4 |
| 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 Carr across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Arthur Carr (~0.92 confidence) and father Jesse Carr (~0.92 confidence) and mother Alice Carr (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Arthur Carr
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Jesse Carr
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Alice Carr
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Carr
Son · 1940 · age 25 · b. ~1915 · Massachusetts
★ You are viewing this record
Sibling
Paul Carr
Sibling · 1940 · age 20
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01693-00510)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Miller | 35 | Head | Mechanic | Massachusetts |
| 2 | Viola A Miller | 30 | Wife | — | Phila Pa |
| 3 | Charles Miller | 5 | Son | — | Massachusetts |
| 4 | Eleanor Miller | 2 | Daughter | — | Massachusetts |
| 5 | Ada Burris | 62 | Mother-in-law | — | Canada English |
| 6 | Byrl Burris | 20 | Sister-in-law | — | Massachusetts |
| 7 | John H Carey | 35 | Head | Private Fire Department | Massachusetts |
| 8 | Anna S Carey | 36 | Wife | — | Massachusetts |
| 9 | Ella Mulligan | 38 | Sister-in-law | Public School Teacher | Massachusetts |
| 10 | Joseph Kassi | 45 | Head | Salesman | Massachusetts |
| 11 | Irene Q Kassi | 40 | Wife | — | Massachusetts |
| 12 | Joseph Kassi | 11 | Son | — | Massachusetts |
| 13 | Woodward Kassi | 4 | Son | — | Massachusetts |
| 14 | Charlotte Redden | 17 | State Ward | Housework | Massachusetts |
| 15 | Jesse Carr | 50 | Head | Saleslady | Massachusetts |
| 16 | Robert Carr THIS PERSON | 25 | Son | Chauffeur | Massachusetts |
| 17 | Paul Carr | 20 | Son | Jobber | Massachusetts |
| 18 | Catherine Q Vassar | 72 | Mother | — | Irish Free State |
| 19 | Barton Hocke | 41 | Head | Design Textile Machinery | Massachusetts |
| 20 | Muriel Q Hocke | 37 | Wife | — | England |
| 21 | Robert Hocke | 15 | Son | — | Massachusetts |
| 22 | Lois Hocke | 6 | Daughter | — | Massachusetts |
| 23 | Charles F Carey | 71 | Head | — | Massachusetts |
| 24 | Margaret Q Carey | 71 | Wife | — | Irish Free State |
| 25 | Thomas F Carey | 45 | Son | Clerk | Massachusetts |
| 26 | Alice Carey | 44 | Daughter | — | Massachusetts |
| 27 | Margaret Costello | 41 | Daughter | — | Massachusetts |
| 28 | Walter Costello | 2 | Grandson | — | Massachusetts |
| 29 | John H Mills | 76 | Head | — | England |
| 30 | Harriett T Q Mills | 70 | Wife | — | England |
| 31 | Charles F Mills | 42 | Son | Second Hand Weaver | Massachusetts |
| 32 | Ora Mills | 42 | Daughter-in-law | — | Massachusetts |
| 33 | Alfred Magnan | 31 | Head | Bus Operator | Massachusetts |
| 34 | Mary Q Magnan | 30 | Wife | — | Massachusetts |
| 35 | Pauline Magnan | 1 | Daughter | — | Massachusetts |
| 36 | Anthony Silva | 63 | Head | Bottler | Port |
| 37 | Rose Silva | 63 | Wife | — | Port |
| 38 | Flora Silva | 25 | Daughter | Twister | Massachusetts |
| 39 | Catherine Silva | 20 | Daughter | — | Massachusetts |
Pedigree Summary
Robert + 1 sibling
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)