GT
Grace Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Grace Thompson across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Andrew & Andrew — first a daughter (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Thompson |
| Given Name | Grace E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Cashier |
| Industry | Amusement |
| Class of Worker | PW |
| Income (1939) | 750 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Cashier |
| Township / Ward | Malden 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Grace | Age | Birth yr |
|---|---|---|---|---|
| Grace Thompson | Daughter | — | 25 | ~1915 |
| Andrew Thompson | Head | — | 49 | ~1891 |
| Frances Thompson | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 4
Middlesex, Massachusetts · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Grace E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 15
Middlesex, Massachusetts · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Grace E. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 25
Middlesex-County, Massachusetts · implied b. ~1915 — 3 household members
| Surname | Thompson |
| Given Name | Grace E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden City |
| 1935 Residence (County) | Middlesex |
| Occupation | Cashier |
| Industry | Amusement |
| Class of Worker | PW |
| Income (1939) | 750 |
| Highest Grade | H 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 Grace Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Andrew Thompson (~0.92 confidence) and father Andrew Thompson (~0.92 confidence) and mother Frances Thompson (~0.92 confidence) and mother Frances Thompson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Andrew Thompson
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Andrew Thompson
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Frances Thompson
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Frances Thompson
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Grace Thompson
Daughter · 1940 · age 25 · b. ~1915 · 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-t0627-01608-00432)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas F. Doherty | 55 | Head | Postal Carrier | Massachusetts |
| 42 | Mary L. Doherty | 59 | Wife | 0 | England |
| 43 | Vincent T. Doherty | 17 | Son | 0 | Massachusetts |
| 44 | Helen Mylor | 48 | Sister-in-law | Saleslady | Canada |
| 45 | Anthony Bracon | 11 | Lodger | — | Massachusetts |
| 46 | Joseph Lundrigan | 5 | Lodger | — | Massachusetts |
| 47 | Bernard Levone | 5 | Lodger | — | Massachusetts |
| 48 | William S. Ingley | 35 | Head | Salesman | New Jersey |
| 49 | Helen M. Ingley | 33 | Wife | 0 | Massachusetts |
| 50 | Margaret Walsh | 83 | Head | 0 | Eire |
| 51 | Katherine C. Walsh | 53 | Daughter | Stenographer | Massachusetts |
| 52 | Anna M. Walsh | 49 | Daughter | Typist | Massachusetts |
| 53 | Harold M. Lydston | 43 | Head | Vault Manager | Massachusetts |
| 54 | Helen S. Lydston | 41 | Wife | 0 | Rhode Island |
| 55 | Walter C. Lydston | 12 | Son | — | Massachusetts |
| 56 | Edward J. Callahan | 30 | Head | Buyer | Massachusetts |
| 57 | Lillian R. Callahan | 32 | Wife | 0 | Massachusetts |
| 58 | Frederick Devanna | 70 | Head | 0 | Newfoundland |
| 59 | Ellen Devanna | 72 | Wife | 0 | Massachusetts |
| 60 | Dorothy C. Devanna | 32 | Daughter | Bank Clerk | Massachusetts |
| 61 | Frank H. Weeks | 60 | Head | Painter | Massachusetts |
| 62 | Sarah A. Weeks | 52 | Wife | 0 | Massachusetts |
| 63 | John J. Skerry | 61 | Head | Assistant Stockkeeper | Eire |
| 64 | Delia W. Skerry | 59 | Wife | 0 | Eire |
| 65 | Richard Skerry | 24 | Son | Laborer | Massachusetts |
| 66 | Rita Skerry | 20 | Daughter | New Worker | Massachusetts |
| 67 | Walter Skerry | 16 | Son | 0 | Massachusetts |
| 68 | Patrick J. Donovan | 72 | Head | 0 | Massachusetts |
| 69 | Mary A. Donovan | 60 | Wife | 0 | Massachusetts |
| 70 | Mary E. Donovan | 24 | Daughter | Telephone Operator | Massachusetts |
| 71 | William J. Breagy | 24 | Head | Mail Clerk | Massachusetts |
| 72 | Marion L. Breagy | 20 | Wife | 0 | Rhode Island |
| 73 | William J. Jr. Breagy | 5 | Son | — | Massachusetts |
| 74 | Robert L. Breagy | 4 | Son | — | Massachusetts |
| 75 | Andrew J. Thompson | 49 | Head | Roofer | Massachusetts |
| 76 | Frances K. Thompson | 48 | Wife | 0 | Massachusetts |
| 77 | Grace E. Thompson THIS PERSON | 25 | Daughter | Cashier | Massachusetts |
| 78 | Anthony Vieira | 42 | Head | Press Man | Portugal |
| 79 | Mary Vieira | 36 | Wife | 0 | Portugal |
| 80 | Anthony Vieira | 13 | Son | 0 | Massachusetts |
Pedigree Summary
Grace
Gen 1 · 4 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)