MC
Mary Crowley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Crowley across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 6-person household.
Age 70
b. ~1870
Female
Head
Born: Massachusetts
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Crowley |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lawrence City |
| Est. Birth Year | ~1870 |
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 |
|---|---|---|---|---|
| Mary Crowley | Daughter | — | 38 | ~1902 |
| Mary Crowley | Head | — | 70 | ~1870 |
| Helena Crowley | Daughter | — | 40 | ~1900 |
| Esther Crowley | Daughter | — | 35 | ~1905 |
| Margaret Crowley | Daughter | — | 42 | ~1898 |
| Daniel Crowley | Son | — | 30 | ~1910 |
Census Appearances
1930
Essex, Massachusetts
Other, age 60
Essex, Massachusetts · implied b. ~1870 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crowley |
| Given Name | Mary E |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 18 |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Head, age 70
Essex-County, Massachusetts · implied b. ~1870 — 6 household members
| Surname | Crowley |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Hours Worked | 0 |
| Highest Grade | No 5 |
| 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 Crowley across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Crowley
Head · 1940 · age 70 · b. ~1870 · 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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01584-00061)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Quire Metzmaekers | 49 | Head | Truck-Driver | Belgium |
| 2 | Louise Metzmaekers | 48 | Wife | — | Belgium |
| 3 | Verna Metzmaekers | 21 | Daughter | Clerk | Massachusetts |
| 4 | Godfrey Drake | 79 | Head | — | Canada-French |
| 5 | Ida Drake | 42 | Daughter | Drawer | Maine |
| 6 | Emily Fisher | 45 | Daughter | Drawer | New Hampshire |
| 7 | William Taylor | 23 | Son-in-law | Butler | Massachusetts |
| 8 | Alice Taylor | 19 | Granddaughter | — | New York |
| 9 | William Jr. Taylor | 0 | Gr-grandson | — | Massachusetts |
| 10 | Henry Decoeq | 30 | Head | Truck Driver | Massachusetts |
| 11 | Rose Decoeq | 25 | Wife | — | Canada-French |
| 12 | Litra Decoeq | 1 | Daughter | — | Massachusetts |
| 13 | Lionel Decoeq | 0 | Son | — | Massachusetts |
| 14 | John Gagnon | 51 | Head | Operative | Canada-French |
| 15 | Rose Gagnon | 47 | Wife | — | Canada-French |
| 16 | Bruce Gagnon | 21 | Son | Operative | Massachusetts |
| 17 | Lucille Gagnon | 11 | Daughter | — | Massachusetts |
| 18 | Rudolph Renard | 56 | Head | — | Massachusetts |
| 19 | Alice Renard | 55 | Wife | Drawer | Canada-French |
| 20 | Lionel Renard | 25 | Son | Attendant | Massachusetts |
| 21 | Annette Renard | 20 | Daughter | Drawer | Massachusetts |
| 22 | Sarah A. Wallace | 63 | Head | — | England |
| 23 | Alice Wallace | 30 | Daughter | Winder | Massachusetts |
| 24 | Rita Wallace | 26 | Daughter | Operative | Massachusetts |
| 25 | William Wallace | 28 | Head | Pattern-Weaver | Massachusetts |
| 26 | Doris Wallace | 29 | Wife | — | Massachusetts |
| 27 | Barbara Wallace | 1 | Daughter | — | Massachusetts |
| 28 | Tenement Vacant | None | — | — | — |
| 29 | Mary Crowley THIS PERSON | 70 | Head | — | Massachusetts |
| 30 | Daniel Crowley | 30 | Son | — | Massachusetts |
| 31 | Esther Crowley | 35 | Daughter | Clerk | Massachusetts |
| 32 | Mary Crowley | 38 | Daughter | School-Teacher | Massachusetts |
| 33 | Helena Crowley | 40 | Daughter | School-Teacher | Massachusetts |
| 34 | Margaret Crowley | 42 | Daughter | — | Massachusetts |
| 35 | James King | 71 | Head | — | Eire-South |
| 36 | Mabel King | 33 | Daughter | — | Massachusetts |
| 37 | Frank Lord | 27 | Head | Machinist | England |
| 38 | Louise Lord | 29 | Wife | — | Massachusetts |
| 39 | Roland Chretien | 29 | Head | Labourer | Massachusetts |
| 40 | Lucille Chretien | 27 | Wife | Winder | New Hampshire |
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)