MG
Margaret Gray — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Margaret Gray across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Charles & John — first a daughter (b.~1920), then head of a 5-person household.
Age 20
b. ~1920
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Gray |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Cambridge |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Industry | H |
| Class of Worker | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Billerica |
| Est. Birth Year | ~1920 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Charles Gray | Other | — | ~1940 | |
| Charles Gray | Head | — | 59 | ~1881 |
| Charles Gray | Son | — | 32 | ~1908 |
| Margaret Gray | Daughter | — | 20 | ~1920 |
| Catherine Gray | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 1
Middlesex, Massachusetts · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gray |
| Given Name | Margaret D. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| 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 11
Middlesex, Massachusetts · implied b. ~1919 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gray |
| Given Name | Margaret D. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| 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 20
Middlesex-County, Massachusetts · implied b. ~1920 — 5 household members
| Surname | Gray |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Cambridge |
| 1935 Residence (County) | Middlesex |
| Industry | H |
| Class of Worker | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Massachusetts |
| 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 Margaret Gray across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Gray (~0.92 confidence) and father John Gray (~0.92 confidence) and father John Gray (~0.92 confidence) and mother Catherine Gray (~0.92 confidence) and mother Margaret Gray (~0.92 confidence) and mother Mary Gray (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Gray
b. ~1881
Source father
● Household
· direct · ~0.92
Father
John Gray
b. ~1886
Source father
● Household
· direct · ~0.92
Father
John Gray
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Catherine Gray
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Margaret Gray
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Mary Gray
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Gray
Daughter · 1940 · age 20 · b. ~1920 · Massachusetts
★ You are viewing this record
Sibling
Charles Gray
Sibling · 1940 · age 32
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
40 people indexed on this census page (nara:1940:m-t0627-01603-00456)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward Votour | 36 | Head | Salesman | Canada French |
| 2 | Ruth Votour | 27 | Wife | — | Massachusetts |
| 3 | Marilyn Votour | 5 | Daughter | — | Massachusetts |
| 4 | Edna Votour | 1 | Sister | — | Massachusetts |
| 5 | James Mcnaughton | 66 | Head | Laborer | Canada Eng |
| 6 | William Crawford | 59 | Head | Manufacturer | Northern Ireland |
| 7 | Sarah Crawford | 56 | Wife | — | Northern Ireland |
| 8 | Joseph Mccumber | 75 | Head | Old Age Pension | Canada Eng |
| 9 | Sara Mccumber | 65 | Wife | — | Canada Eng |
| 10 | Matthew Fleming | 48 | Head | Truck Driver | Massachusetts |
| 11 | Sheila Fleming | 34 | Wife | — | Eire |
| 12 | Marie Fleming | 14 | Daughter | — | Massachusetts |
| 13 | Margaret Fleming | 8 | Daughter | — | Massachusetts |
| 14 | Matthew Fleming | 4 | Son | — | Massachusetts |
| 15 | Edward Fleming | 1 | Son | — | Massachusetts |
| 16 | Richard Mckay | 24 | Son | Truck Driver | Nova Scotia |
| 17 | Lillian Mckay | 23 | Wife | — | Vermont |
| 18 | Charles S. Gray | 59 | Head | Foreman | Canada Eng |
| 19 | Catherine Gray | 57 | Wife | — | Massachusetts |
| 20 | Margaret Gray THIS PERSON | 20 | Daughter | — | Massachusetts |
| 21 | Charles R. Gray | 32 | Son | Compositor | Massachusetts |
| 22 | Charles P. Gray | 0 | Grandson | — | Massachusetts |
| 23 | William Holdman | 39 | Head | Soapmaker | England |
| 24 | Olivia Holdman | 38 | Wife | — | Massachusetts |
| 25 | William Holdman | 14 | Son | — | Massachusetts |
| 26 | James Holdman | 12 | Son | — | Massachusetts |
| 27 | Judith Holdman | 7 | Daughter | — | Massachusetts |
| 28 | Frederick Boyle | 35 | Head | Clerk | Massachusetts |
| 29 | Catherine Boyle | 34 | Wife | — | Massachusetts |
| 30 | Beverly Boyle | 5 | Daughter | — | Massachusetts |
| 31 | Francis P. Mahoney | 60 | Head | Installer | Massachusetts |
| 32 | Mary G. Mahoney | 55 | Wife | — | Eire |
| 33 | Martin L. Mahoney | 25 | Daughter | Comptometer | Massachusetts |
| 34 | Ernest L. Mahoney | 26 | Son | Attendant | Massachusetts |
| 35 | Arthur J. Mahoney | 22 | Son | Janitor | Massachusetts |
| 36 | Charles J. Mahoney | 18 | Son | — | Massachusetts |
| 37 | Francis G. Mahoney | 30 | Son | Manager | Massachusetts |
| 38 | Jennie Driscoll | 46 | Head | Soldiers Relief | Massachusetts |
| 39 | Thelma Driscoll | 15 | Daughter | New Worker | Massachusetts |
| 40 | Dora Hartman | 69 | Mother | — | Germany |
Pedigree Summary
Margaret + 1 sibling
Gen 1 · 6 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)