MC
Mary Collier — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Collier across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 8-person household.
Age 15
b. ~1925
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Collier |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1925 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Collier | Daughter | — | 15 | ~1925 |
| John Collier | Son | — | 18 | ~1922 |
| Helen Collier | Daughter | — | 7 | ~1933 |
| Anna Collier | Spouse | — | 36 | ~1904 |
| Margaret Collier | Daughter | — | 10 | ~1930 |
| Joseph Collier | Son | — | 17 | ~1923 |
| Frank Collier | Son | — | 11 | ~1929 |
| Henry Collier | Head | — | 41 | ~1899 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 5
Suffolk, Massachusetts · implied b. ~1925 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Collier |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New York |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 15
Suffolk-County, Massachusetts · implied b. ~1925 — 8 household members
| Surname | Collier |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | H-1 |
| 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 Collier across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Collier
Daughter · 1940 · age 15 · b. ~1925 · Massachusetts
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Sibling
Joseph Collier
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Collier
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Collier
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Collier
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Collier
Sibling · 1940 · age 11
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01667-00670)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George P. Lawler | 67 | Head | Painter | Massachusetts |
| 2 | Joseph F. Doucette | 34 | Head | Shoemaker | Massachusetts |
| 3 | Marion Doucette | 32 | Wife | — | Massachusetts |
| 4 | Richard Doucette | 8 | Son | — | Massachusetts |
| 5 | Eleanor Doucette | 7 | Daughter | — | Massachusetts |
| 6 | Alice P. Phipps | 64 | Head | — | Massachusetts |
| 7 | Robert Perit | 27 | Head | — | Massachusetts |
| 8 | Anna Perit | 24 | Wife | — | Massachusetts |
| 9 | Carrie Gillespie | 49 | Head | Laundress | Massachusetts |
| 10 | Arthur French | 36 | Lodger | Gas Station Attendant | Massachusetts |
| 11 | John W. Grube | 45 | Head | Carpenter | Latvia |
| 12 | Bessie Grube | 43 | Wife | — | Latvia |
| 13 | William Elbetts | 60 | Head | Painter | Massachusetts |
| 14 | Elizabeth Elbetts | 56 | Wife | — | Scotland |
| 15 | Samuel Chami | 47 | Head | Salesman | Italy |
| 16 | George Chami | 17 | Son | — | Massachusetts |
| 17 | Regina Chami | 16 | Daughter | — | Massachusetts |
| 18 | Paul Chami | 11 | Son | — | Massachusetts |
| 19 | Ruth Chami | 10 | Daughter | — | Massachusetts |
| 20 | Charles Chami | 7 | Son | — | Massachusetts |
| 21 | Cora Powell | 40 | Housekeeper | Housekeeper | Latvia |
| 22 | Henry Collier | 41 | Head | Laborer | New York |
| 23 | Anna Collier | 36 | Wife | — | Massachusetts |
| 24 | John Collier | 18 | Son | Odd Jobs | Massachusetts |
| 25 | Joseph Collier | 17 | Son | Home Worker | Massachusetts |
| 26 | Mary Collier THIS PERSON | 15 | Daughter | — | Massachusetts |
| 27 | Frank Collier | 11 | Son | — | Massachusetts |
| 28 | Margaret Collier | 10 | Daughter | — | Massachusetts |
| 29 | Helen Collier | 7 | Daughter | — | Massachusetts |
| 30 | John Mitchell | 49 | Head | Finisher | Massachusetts |
| 31 | Margaret Mitchell | 47 | Sister | Stitcher | Massachusetts |
| 32 | Frederick Mitchell | 38 | Brother | — | Massachusetts |
| 33 | John Brady | 50 | Head | Painter | Ireland |
| 34 | Catherine Brady | 57 | Sister | Packer | Massachusetts |
| 35 | Mary Brady | 52 | Sister | — | Ireland |
| 36 | Isaiah Flynn | 29 | Nephew | Teacher | Massachusetts |
| 37 | Philip A. Morris | 27 | Head | Counter Man | Massachusetts |
| 38 | Harriet G. Donlow | 35 | Partner | Salesman | Rhode Island |
| 39 | Hamilton A. Williams | 61 | Head | Clerk | Georgia |
| 40 | Bernice A. Williams | 61 | Wife | — | Massachusetts |
Related Census Records
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)