MC
Mary Coffey — 1940 US Census Record
Model Tree available1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Coffey across the 1920, 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Henry & Henry — 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 | Essex-County, Massachusetts |
| Surname | Coffey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | West Newbury Town |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | West Newbury Town |
| 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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Coffey | Daughter | — | 20 | ~1920 |
| Helen Coffey | Spouse | — | 42 | ~1898 |
| Mildred Coffey | Daughter | — | 16 | ~1924 |
| Helen Coffey | Daughter | — | 19 | ~1921 |
| Henry Coffey | Head | — | 46 | ~1894 |
Census Appearances
1920
Essex, Massachusetts
Daughter, age
Essex, Massachusetts · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coffey |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Daughter, age 10
Essex, Massachusetts · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coffey |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| 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
Essex-County, Massachusetts
Daughter, age 20
Essex-County, Massachusetts · implied b. ~1920 — 5 household members
| Surname | Coffey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | West Newbury Town |
| 1935 Residence (County) | Essex |
| Income (1939) | 0 |
| Highest Grade | Hs 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 Coffey across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Henry Coffey (~0.92 confidence) and father Henry Coffey (~0.92 confidence) and father Timothy Coffey (~0.84 confidence) and mother Mary Coffey (~0.84 confidence) and mother Helen Coffey (~0.92 confidence). The pedigree spans 2 generations with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.89
Father
Henry Coffey
b. ~1893
Source father
● Household
· direct · ~0.92
Father
Henry Coffey
b. ~1895
Source father
● Household
· direct · ~0.92
Father
Timothy Coffey
b. ~1868
Source father>father
● Household
· direct · ~0.84
Mother
Mary Coffey
b. ~1867
Source father>mother
● Household
· direct · ~0.84
Mother
Helen Coffey
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Coffey
Daughter · 1940 · age 20 · b. ~1920 · Massachusetts
★ You are viewing this record
Sibling
Helen Coffey
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Coffey
Sibling · 1940 · age 16
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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01590-00909)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 42 | Henry Coffey | 46 | Head | Farmer | Massachusetts |
| 43 | Helen Coffey | 42 | Wife | — | Massachusetts |
| 44 | Mary Coffey THIS PERSON | 20 | Daughter | — | Massachusetts |
| 45 | Helen Coffey | 19 | Daughter | — | Massachusetts |
| 46 | Mildred Coffey | 16 | Daughter | — | Massachusetts |
| 47 | Joshua Bowen | 70 | Head | Farmer | Massachusetts |
| 48 | Mary Bowen | 62 | Wife | — | Ireland |
| 50 | Albert Cloepk|Cloepke | 66 | Head | Farmer | Poland |
| 51 | Maggie Cloepk|Cloepke | 66 | Wife | — | Poland |
| 52 | Antonio Possante | 39 | Head | Farmer | Portugal |
| 53 | Florence Possante | 33 | Wife | — | Massachusetts |
| 54 | Alda Possante | 14 | Daughter | — | Massachusetts |
| 55 | Mary Anna Possante | 10 | Daughter | — | Massachusetts |
| 56 | George Watson | 33 | Head | Carpenter | Massachusetts |
| 57 | Marion Watson | 34 | Wife | — | New York |
| 58 | David Watson | 13 | Son | — | Maine |
| 59 | Elizabeth Watson | 11 | Daughter | — | Massachusetts |
| 60 | Cyrus Watson | 7 | Son | — | Massachusetts |
| 61 | Cyrus Watson | 82 | Father | — | Massachusetts |
| 62 | Maude Hill | 55 | Head | — | Massachusetts |
| 63 | Ward Stanwood | 73 | Uncle | Farmer | Massachusetts |
| 64 | Thomas Robbins | 30 | Head | Machinist | Massachusetts |
| 65 | Catherine Robbins | 28 | Wife | — | Massachusetts |
| 66 | Thomas H Robbins | 5 | Son | — | Massachusetts |
| 67 | Timothy Robbins | 0 | Son | — | Massachusetts |
| 68 | Gilpha Melville | 44 | Head | — | Massachusetts |
| 69 | Bruce Melville | 22 | Son | Salesman | Massachusetts |
| 70 | Eleanor Melville | 19 | Daughter | Housemaid | Massachusetts |
| 71 | William J Melville | 18 | Son | — | Massachusetts |
| 72 | Greta Melville | 16 | Daughter | — | Massachusetts |
| 73 | Richard Melville | 14 | Son | — | Massachusetts |
| 74 | George Knowles | 66 | Head | Poultryman | New Hampshire |
| 75 | Mary Knowles | 34 | Wife | — | Massachusetts |
| 76 | Albert H Knowles | 27 | Son | Poultryman | Massachusetts |
| 77 | Lucy E Knowles | 25 | Daughter in law | — | Massachusetts |
| 78 | Harley Kendall | 63 | Head | Poultryman | Vermont |
| 79 | Pearl Kendall | 54 | Wife | — | Massachusetts |
| 80 | Frances Platt | 33 | Head | — | Massachusetts |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 3 parents
~0.92
Gen 2 · 2 grandparents
~0.84
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)