LJ
Lucy Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Lucy Johnson across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1860), then head of a 3-person household.
Age 80
b. ~1860
Female
Head
Born: Maine
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Johnson |
| Given Name | Lucy |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 80 |
| Marital Status | Widowed |
| Birthplace | Maine |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1860 |
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 Lucy | Age | Birth yr |
|---|---|---|---|---|
| Frances Harrison | Daughter | — | 47 | ~1893 |
| Lucy Johnson | Head | — | 80 | ~1860 |
| William Johnson | Son | — | 50 | ~1890 |
Census Appearances
1920
Middlesex, Massachusetts
Other, age 60
Middlesex, Massachusetts · implied b. ~1860 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Laura |
| Relationship to Head | Sister |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Widowed |
| Birthplace | Maine |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
Middlesex, Massachusetts
Other, age 70
Middlesex, Massachusetts · implied b. ~1860 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Lucy S. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Maine |
| Age at First Marriage | 24 |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
Middlesex-County, Massachusetts
Head, age 80
Middlesex-County, Massachusetts · implied b. ~1860 — 3 household members
| Surname | Johnson |
| Given Name | Lucy |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 80 |
| Marital Status | Widowed |
| Birthplace | Maine |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Class of Worker | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Lucy Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Lucy Johnson
Head · 1940 · age 80 · b. ~1860 · Massachusetts
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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-t0627-01705-00006)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marie B. Vannah | 37 | Wife | — | Massachusetts |
| 2 | George A. Jr. Vannah | 3 | Son | — | Massachusetts |
| 3 | Mildred E. Smith | 37 | Lodger | Clerk | Massachusetts |
| 4 | Minnie C. F. May | 26 | Head | — | Massachusetts |
| 5 | Lillian C. May | 66 | Sister | Salesgirl | Massachusetts |
| 6 | Thomas H. Lalton | 68 | Head | Electrician | Massachusetts |
| 7 | Laura Lalton | 65 | Wife | — | Massachusetts |
| 8 | Bradford Lalton | 25 | Son | Laborer | Massachusetts |
| 9 | Lucy Lalton | 24 | Daughter | — | Massachusetts |
| 10 | Aaron Parsons | 33 | Head | Silversmith | Massachusetts |
| 11 | Viola Parsons | 31 | Wife | — | Massachusetts |
| 12 | George F. Parsons | 5 | Son | — | Massachusetts |
| 13 | Diane Parsons | 2 | Daughter | — | Massachusetts |
| 14 | Mary E. Rogers | 71 | Head | — | Massachusetts |
| 15 | Ralph A. Kelley | 56 | Head | Civil Engineer | Massachusetts |
| 16 | Henrietta S. Kelley | 55 | Wife | — | Massachusetts |
| 17 | Harriet S. Kelley | 27 | Daughter | Stenographer | Massachusetts |
| 18 | Donald S. Kelley | 17 | Son | — | Massachusetts |
| 19 | Leon Machado | 70 | Head | — | Canada-French |
| 20 | Frances Machado | 67 | Wife | — | Canada-English |
| 21 | William Vailherio | 70 | Lodger | Careman | Canada-French |
| 22 | — | None | — | — | — |
| 23 | Saul Biller | 35 | Head | Dentist | Massachusetts |
| 24 | Beatrice Biller | 35 | Wife | — | Massachusetts |
| 25 | Judith Biller | 1 | Daughter | — | Massachusetts |
| 26 | Dorothy Thompkins | 20 | Maid | Maid | Maine |
| 27 | Ralph Hillson | 43 | Head | Manager | Massachusetts |
| 28 | Dora Hillson | 42 | Wife | — | Massachusetts |
| 29 | Frances Hillson | 17 | Daughter | — | Massachusetts |
| 30 | Myra Hillson | 14 | Daughter | — | Massachusetts |
| 31 | Joseph Hillson | 12 | Son | — | Massachusetts |
| 32 | David Weinstein | 40 | Brother-in-law | Manager | Massachusetts |
| 33 | Lucy Johnson THIS PERSON | 80 | Head | — | Maine |
| 34 | William B. Johnson | 50 | Son | Electrician | Maine |
| 35 | Frances P. Harrison | 47 | Daughter | Clerk | Maine |
| 36 | Benjamin S. Carry | 62 | Head | Clerk | Massachusetts |
| 37 | Genevieve F. Carry | 61 | Wife | — | Massachusetts |
| 38 | Joan M. Carry | 64 | Sister | Monotype Keyboard Operator | Massachusetts |
| 39 | Sara M. Barts | 57 | Lodger | — | Massachusetts |
| 40 | John Faunce | 37 | Lodger | Salesman | Maine |
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)