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Mary Mcgrath — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Mcgrath across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 6-person household.
Age 52
b. ~1888
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | McGrath |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | The City of Cambridge |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Housewife |
| Industry | At Home |
| Class of Worker | H |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Housewife |
| Township / Ward | The City Of Cambridge |
| Est. Birth Year | ~1888 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Anne Mcgrath | Daughter | — | 13 | ~1927 |
| Mary Mcgrath | Daughter | — | 15 | ~1925 |
| John Mcgrath | Head | — | 52 | ~1888 |
| Lawrence O'Donnell | Other | — | 49 | ~1891 |
| Edward Mcgrath | Son | — | 19 | ~1921 |
| Mary Mcgrath | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Middlesex, Massachusetts
Other, age 32
Middlesex, Massachusetts · implied b. ~1888 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Mary E |
| Relationship to Head | Servant |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Housekeeper |
| Industry | Private Family |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Other, age 42
Middlesex, Massachusetts · implied b. ~1888 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Mary A. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 28 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 52
Middlesex-County, Massachusetts · implied b. ~1888 — 6 household members
| Surname | McGrath |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | The City of Cambridge |
| 1935 Residence (County) | Middlesex |
| Occupation | Housewife |
| Industry | At Home |
| Class of Worker | H |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 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 Mcgrath across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Mcgrath
Spouse · 1940 · age 52 · b. ~1888 · Massachusetts
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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-t0627-01683-00343)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Patsy Lombardo | 33 | Head | Shoe Maker | Italy |
| 42 | Jennie Lombardo | 28 | Wife | Housewife | Italy |
| 43 | Salvador Lombardo | 9 | Son | — | Italy |
| 44 | Joseph Claudis | 30 | Head | Truck Driver | Pennsylvania |
| 45 | Tina Claudis | 26 | Wife | Stitcher | Rhode Island |
| 46 | John Paulikas | 59 | Head | Meat Packer | Lithuania |
| 47 | Rose Paulikas | 56 | Wife | Housewife | Lithuania |
| 48 | Benjamin Paulikas | 24 | Son | Meat Packer | Massachusetts |
| 49 | John Paulikas | 19 | Son | Student | Massachusetts |
| 50 | John A. Mcgrath | 52 | Head | U.S. Mail Clerk | Massachusetts |
| 51 | Mary A. Mcgrath THIS PERSON | 52 | Wife | Housewife | Massachusetts |
| 52 | Edward Mcgrath | 19 | Son | Student | Massachusetts |
| 53 | Mary G. Mcgrath | 15 | Daughter | Student | Massachusetts |
| 54 | Anne J. Mcgrath | 13 | Daughter | Student | Massachusetts |
| 55 | Lawrence O'Donnell | 49 | Father in Law | Jack-Hammer | Massachusetts |
| 56 | Peter Yuggan | 62 | Head | Unable | Turkey |
| 57 | Zimroub Yuggan | 56 | Wife | Housewife | Turkey |
| 58 | John P. Yuggan | 28 | Son | Cook | Turkey |
| 59 | Aram Yuggan | 26 | Son | Cook | Turkey |
| 60 | Mary Yuggan | 24 | Daughter | Saleslady | Turkey |
| 61 | Sarkis Yuggan | 19 | Son | Cooks Helper | Massachusetts |
| 62 | Irene Yuggan | 17 | Daughter | Student | Massachusetts |
| 63 | Dorthy Yuggan | 15 | Daughter | Student | Massachusetts |
| 64 | John Shaghalian | 52 | Head | Tailor | Turkey |
| 65 | Elsie Shaghalian | 39 | Wife | Seamstress | Turkey |
| 66 | Phyllis Shaghalian | 18 | Daughter | Saleslady | Massachusetts |
| 67 | Florence Shaghalian | 15 | Daughter | Student | Massachusetts |
| 68 | Block 283 Ended And Block 284 Begins | None | — | — | — |
| 69 | John J. Duffy | 57 | Head | Truck Driver | Massachusetts |
| 70 | Catherine Duffy | 47 | Wife | Stitcher | Massachusetts |
| 71 | George Gallagher | 64 | Head | Unable | Massachusetts |
| 72 | Mary Alves | 66 | Head | Unable | Portugal |
| 73 | Mary Quintal | 23 | Head | Stitcher | Massachusetts |
| 74 | Angelina Quintal | 17 | Sister | Stitcher | Massachusetts |
| 75 | Isabelle Quintal | 13 | Sister | — | Massachusetts |
| 76 | Manuel A. Perry | 64 | Head | Unable | Portugal |
| 77 | David Halperny | 49 | Head | Store Keeper | Russia |
| 78 | Jennie Halperny | 48 | Wife | Housewife | Russia |
| 79 | Hyman Halperny | 25 | Son | Clerk | Massachusetts |
| 80 | Ruth Halperny | 22 | Daughter | School Teacher | Massachusetts |
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)