JC
John Carr — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Carr across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Honora & John — first a son (b.~1911), then head of a 4-person household.
Age 29
b. ~1911
Male
Son
Born: New Hampshire
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Carr |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 350 |
| Highest Grade | C 4 |
| 1935 Residence | Same Place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Occupation | Teacher |
| Township / Ward | Malden City |
| Est. Birth Year | ~1911 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Agnes Carr | Daughter | — | 30 | ~1910 |
| Honora Carr | Head | — | 70 | ~1870 |
| John Carr | Son | — | 29 | ~1911 |
| Robert Carr | Son | — | 24 | ~1916 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 8
Middlesex, Massachusetts · implied b. ~1912 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carr |
| Given Name | John B |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | New Hampshire |
| Birth State | New Hampshire |
| Birth Country | United States |
| Year of Naturalization | Yes |
| Birthplace (normalized) | new hampshire |
1930
Middlesex, Massachusetts
Son, age 18
Middlesex, Massachusetts · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carr |
| Given Name | John B. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | New Hampshire |
| Can Read/Write | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Middlesex-County, Massachusetts
Son, age 29
Middlesex-County, Massachusetts · implied b. ~1911 — 4 household members
| Surname | Carr |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 350 |
| Highest Grade | C 4 |
| 1935 Residence | Same Place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 John Carr across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Honora Carr (~0.92 confidence) and father John Carr (~0.92 confidence) and mother Nora Carr (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Honora Carr
b. ~1870
Source mother
● Household
· direct · ~0.92
Father
John Carr
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Nora Carr
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Carr
Son · 1940 · age 29 · b. ~1911 · Massachusetts
★ You are viewing this record
Sibling
Agnes Carr
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Carr
Sibling · 1940 · age 24
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-t0627-01609-00186)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sarah Lawson | 56 | Head | — | England |
| 42 | William Lawson | 34 | Son | Machinist | Wales |
| 43 | Honora Carr | 70 | Head | — | New Hampshire |
| 44 | Agnes Carr | 30 | Daughter | — | New Hampshire |
| 45 | Robert Carr | 24 | Son | Sales Clerk | New Hampshire |
| 46 | John Carr THIS PERSON | 29 | Son | Teacher | New Hampshire |
| 47 | Nellie M. Anzuoni | 55 | Head | — | Massachusetts |
| 48 | Walter Anzuoni | 24 | Son | Stock Clerk | Massachusetts |
| 49 | Donna Anzuoni | 23 | Daughter | Waitress | Massachusetts |
| 50 | Margaret Anzuoni | 21 | Daughter | Sales Girl | Massachusetts |
| 51 | Beatrice Anzuoni | 14 | Daughter | Sales Girl | Massachusetts |
| 52 | Helen Anzuoni | 13 | Daughter | — | Massachusetts |
| 53 | Thomas O'Malley | 63 | Head | Clerk | Canada Eng |
| 54 | Annie O'Malley | 70 | Wife | — | Massachusetts |
| 55 | Joseph O'Malley | 34 | Son | House Painter | Massachusetts |
| 56 | Frederick Lynch | 36 | Son-in-Law | Auto Mechanic | Massachusetts |
| 57 | Catherine Lynch | 24 | Daughter | — | Massachusetts |
| 58 | John Lynch | 2 | Grandson | — | Massachusetts |
| 59 | Herman J. White | 25 | Nephew | Accountant | Massachusetts |
| 60 | Walter G. Mayo | 61 | Head | Candy Maker | Massachusetts |
| 61 | Eumina T. Mayo | 56 | Wife | — | Massachusetts |
| 62 | Raymond Mayo | 29 | Son | Sorter | Massachusetts |
| 63 | Eumina L. Mayo | 26 | Daughter | Checker | Massachusetts |
| 64 | Edward Mayo | 21 | Son | Typist | Massachusetts |
| 65 | Marie Mayo | 16 | Daughter | — | Massachusetts |
| 66 | Arthur E. Erickson | 58 | Head | Traveling Salesman | Sweden |
| 67 | Annie Erickson | 54 | Wife | — | Massachusetts |
| 68 | Bergen Erickson | 53 | Brother | Traveling Salesman | Sweden |
| 69 | Bertie S. Flagg | 72 | Head | — | Michigan |
| 70 | Lillian G. Flagg | 72 | Wife | — | Massachusetts |
| 71 | Henry Anderson | 65 | Head | Conductor | Canada Eng |
| 72 | Margaret M. Anderson | 60 | Wife | — | Canada Eng |
| 73 | Jean R. Anderson | 20 | Daughter | Typist | Massachusetts |
| 74 | Jennie G. Campbell | 66 | Sister-in-Law | — | Canada Eng |
| 75 | George Waugh | 40 | Head | Billing Clerk | Massachusetts |
| 76 | Anna Waugh | 39 | Wife | Checker | Massachusetts |
| 77 | Ann Duggan | 18 | Daughter | New Worker | Massachusetts |
| 78 | Edward Duggan | 17 | Step-son | — | Massachusetts |
| 79 | Virginia Duggan | 15 | Step-daughter | — | Massachusetts |
Pedigree Summary
John + 2 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)