MD
Mary Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Davis across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Robert & Robert — first a daughter (b.~1920), then head of a 10-person household.
Age 20
b. ~1920
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Davis |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Everett City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Book-Binder |
| Industry | Greeting Cards |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 728 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Book-Binder |
| Township / Ward | Everett City |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Theresa Davis | Daughter | — | 18 | ~1922 |
| Marjorie Davis | Daughter | — | 15 | ~1925 |
| Rosalie Davis | Daughter | — | 27 | ~1913 |
| Mary Davis | Daughter | — | 20 | ~1920 |
| Robert Davis | Head | — | 49 | ~1891 |
| George Davis | Son | — | 23 | ~1917 |
| John Davis | Son | — | 7 | ~1933 |
| William Davis | Son | — | 25 | ~1915 |
| Donald Davis | Son | — | 10 | ~1930 |
| Elizabeth Davis | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age
Middlesex, Massachusetts · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New York |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 10
Middlesex, Massachusetts · implied b. ~1920 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New York |
| 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 — 10 household members
| Surname | Davis |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Everett City |
| 1935 Residence (County) | Middlesex |
| Occupation | Book-Binder |
| Industry | Greeting Cards |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 728 |
| 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 Mary Davis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Davis (~0.92 confidence) and father Robert Davis (~0.92 confidence) and mother Elizabeth Davis (~0.92 confidence) and mother Elizabeth Davis (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Davis
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Robert Davis
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Davis
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Elizabeth Davis
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Davis
Daughter · 1940 · age 20 · b. ~1920 · Massachusetts
★ You are viewing this record
Sibling
William Davis
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Davis
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Davis
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Davis
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Davis
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marjorie Davis
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosalie Davis
Sibling · 1940 · age 27
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-t0627-01605-00075)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Martha M. Lucco | 13 | Daughter | — | Massachusetts |
| 42 | Frank Lucco | 9 | Son | — | Massachusetts |
| 43 | Dolores E. Lucco | 7 | Daughter | — | Massachusetts |
| 44 | Hjalmer Johnson | 61 | Head | Engineer | Sweden |
| 45 | Ida Johnson | 62 | Wife | — | Sweden |
| 46 | Gertrude A. Johnson | 32 | Daughter | Secretary | Massachusetts |
| 47 | Edna F. Johnson | 26 | Daughter | — | Massachusetts |
| 48 | Sandra L. Johnson | 22 | Daughter | Office Clerk | Massachusetts |
| 49 | Lloyd B. Fleet | 38 | Head | Operator | Massachusetts |
| 50 | Rena H. Fleet | 32 | Wife | — | Massachusetts |
| 51 | Marion Fleet | 15 | Daughter | — | Massachusetts |
| 52 | Ruth Fleet | 13 | Daughter | — | Massachusetts |
| 53 | Barbara Fleet | 9 | Daughter | — | Massachusetts |
| 54 | Lloyd Jr. Fleet | 6 | Son | — | Massachusetts |
| 55 | Charles G. Leberg | 75 | Father-in-law | — | Sweden |
| 56 | Robert Gruberg | 66 | Lodger | Elevator Operator | Sweden |
| 57 | Joseph Prendergast | 43 | Head | Pump Dispatcher | Eire |
| 58 | Catherine Prendergast | 45 | Wife | Stitcher | Eire |
| 59 | Albert Prendergast | 13 | Son | — | Northern Ireland |
| 60 | Norman Prendergast | 6 | Son | — | Massachusetts |
| 61 | Ernest Le Beau | 32 | Head | Truck Driver | Connecticut |
| 62 | Grace Le Beau | 30 | Wife | — | Connecticut |
| 63 | Ernestine Le Beau | 6 | Daughter | — | Massachusetts |
| 64 | Robert J. Davis | 49 | Head | Inspector | New York |
| 65 | Elizabeth Davis | 53 | Wife | — | Massachusetts |
| 66 | Rosalie Davis | 27 | Daughter | Book-Binder | Massachusetts |
| 67 | William F. Davis | 25 | Son | Laborer | Massachusetts |
| 68 | George Davis | 23 | Son | Stenographer | Massachusetts |
| 69 | Mary Davis THIS PERSON | 20 | Daughter | Book-Binder | Massachusetts |
| 70 | Theresa Davis | 18 | Daughter | Book-Maker | Massachusetts |
| 71 | Marjorie Davis | 15 | Daughter | — | Massachusetts |
| 72 | Donald Davis | 10 | Son | — | Massachusetts |
| 73 | John Davis | 7 | Son | — | Massachusetts |
| 74 | Thomas Taylor | 76 | Head | — | Newfoundland |
| 75 | Rachel Taylor | 65 | Wife | — | Northern Ireland |
| 76 | John A. Pankopf | 62 | Head | Lithographer | Germany |
| 77 | Marie H. Pankopf | 60 | Wife | — | New Jersey |
| 78 | Albert E. Roberts | 46 | Head | Plumber | England |
| 79 | Hazel H. Roberts | 36 | Wife | — | New Jersey |
| 80 | Albert E. Roberts | 17 | Son | — | Massachusetts |
Related Census Records
Pedigree Summary
Mary + 7 siblings
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)