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Mary Brennan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Brennan across the 1920, 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1862), then head of a 4-person household.
Age 78
b. ~1862
Female
Head
Born: Ireland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Brennan |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 78 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Lynn City |
| 1935 Residence (County) | Essex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Lynn City |
| Est. Birth Year | ~1862 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Crowley | Daughter | — | 50 | ~1890 |
| Katherine Brennan | Daughter | — | 45 | ~1895 |
| Mary Brennan | Head | — | 78 | ~1862 |
| Thomas Crowley | Other | — | 12 | ~1928 |
Census Appearances
1920
Suffolk, Massachusetts
Spouse, age 56
Suffolk, Massachusetts · implied b. ~1864 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1880 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1885 |
| Birthplace (normalized) | ireland |
1930
Suffolk, Massachusetts
Head, age 68
Suffolk, Massachusetts · implied b. ~1862 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 68 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1880 |
| Age at First Marriage | 27 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Essex-County, Massachusetts
Head, age 78
Essex-County, Massachusetts · implied b. ~1862 — 4 household members
| Surname | Brennan |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 78 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Lynn City |
| 1935 Residence (County) | Essex |
| Naturalization Status | Naturalized |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Brennan 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 Brennan
Head · 1940 · age 78 · b. ~1862 · 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-t0627-01696-00018)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Helen Everett | 2 | Daughter | — | Mass. |
| 2 | Henry Everett | 0 | Son | — | Mass. |
| 3 | Henry A. Carter | 73 | Head | Fireman | Canada-Eng. |
| 4 | Mary A. Carter | 75 | Wife | — | Canada-Eng. |
| 5 | Edward F. Cronin | 36 | Head | Stereotyper | Mass. |
| 6 | Dorothy M. A. Cronin | 36 | Wife | — | Mass. |
| 7 | Lawrence C. Cronin | 11 | Son | — | Mass. |
| 8 | Vincent M. Cronin | 9 | Son | — | Mass. |
| 9 | John V. Linehan | 56 | Head | Laborer | Mass. |
| 10 | Ella L. Linehan | 49 | Wife | — | Mass. |
| 11 | Mary E. Brennan THIS PERSON | 78 | Head | — | Ireland |
| 12 | Mary M. Crowley | 50 | Daughter | — | New Hampshire |
| 13 | Katherine G. Brennan | 45 | Daughter | Office Clerk | New Hampshire |
| 14 | Thomas F. Crowley | 12 | Grandson | — | Mass. |
| 15 | James Doyle | 66 | Head | — | Ireland |
| 16 | Nellie T. Doyle | 53 | Wife | — | New Hampshire |
| 17 | Anne J. Doyle | 18 | Daughter | Stenographer | Mass. |
| 18 | James D. Doyle | 17 | Son | — | Mass. |
| 19 | Mary E. Doyle | 12 | Daughter | — | Mass. |
| 20 | Stephen Doyle | 7 | Son | — | Mass. |
| 21 | Henry Griswold | 42 | Head | Laborer | Same place |
| 22 | Minnie Griswold | 42 | Wife | — | Canada-French |
| 23 | Harold Griswold | 19 | Son | Wood Finisher | Mass. |
| 24 | Dorothy Griswold | 17 | Daughter | — | Mass. |
| 25 | Evelyn E. Moriarty | 26 | Head | Clerk | Mass. |
| 26 | Leslie Moriarty | 25 | Husband | Collector | Mass. |
| 27 | Axel Lindberg | 69 | Father | — | Sweden |
| 28 | John Weden | 71 | Head | — | Sweden |
| 29 | Sigrid A. G. Weden | 46 | Daughter | Laundry Worker | Sweden |
| 30 | John L. Weden | 41 | Son | Inventor | Sweden |
| 31 | Alvin S. Chadwell | 31 | Head | Manager | Pennsylvania |
| 32 | Pauline S. Chadwell | 31 | Wife | — | Rhode Island |
| 33 | Arthur R. Carroll | 58 | Head | Shoe Cutter | New Hampshire |
| 34 | Alice Carroll | 57 | Wife | Stitcher | New Hampshire |
| 35 | Eugene W. Mitchell | 62 | Head | Conductor | Mass. |
| 36 | Mary B. Mitchell | 62 | Wife | — | Mass. |
| 37 | Ariel Calandri | 48 | Head | Barber | Italy |
| 38 | Helen C. Calandri | 42 | Wife | — | Mass. |
| 39 | George G. Calandri | 20 | Son | Clerk | Mass. |
| 40 | Robert D. Savoir | 25 | Head | — | Mass. |
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)