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Mary Brennan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Brennan across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Charles & Mary — first a spouse (b.~1891), then head of a 8-person household.
Age 49
b. ~1891
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Brennan |
| Given Name | Mary A. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1891 |
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 Brennan | Daughter | — | 15 | ~1925 |
| Dorothy Brennan | Daughter | — | 20 | ~1920 |
| Margaret Brennan | Daughter | — | 22 | ~1918 |
| Martin Brennan | Head | — | 50 | ~1890 |
| Robert Brennan | Son | — | 11 | ~1929 |
| Martin Brennan | Son | — | 18 | ~1922 |
| Charles Brennan | Son | — | 25 | ~1915 |
| Mary Brennan | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 28
Suffolk, Massachusetts · implied b. ~1892 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Other, age 39
Suffolk, Massachusetts · implied b. ~1891 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Mary A. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 26 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Irish Free State |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Spouse, age 49
Suffolk-County, Massachusetts · implied b. ~1891 — 8 household members
| Surname | Brennan |
| Given Name | Mary A. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | Hs 2 |
| 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 Brennan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Bond (~0.92 confidence) and mother Mary Bond (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Bond
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Mary Bond
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Brennan
Spouse · 1940 · age 49 · b. ~1891 · Massachusetts
★ You are viewing this record
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-t0627-01667-00529)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harold P. Peterson | 8 | son | — | Massachusetts |
| 2 | Bessie D. Mclean | 73 | head | — | Canada-English |
| 3 | Annie M. Mclean | 35 | daughter | Maid | Canada-English |
| 4 | William G. Flynn | 47 | lodger | Interior Decorator | Canada-English |
| 5 | Frederick J. Brooks | 53 | head | Printer | Massachusetts |
| 6 | Annie A. Brooks | 54 | wife | — | Massachusetts |
| 7 | George W. Brewster | 69 | head | Garage Man | Massachusetts |
| 8 | Sarah E. Brewster | 67 | wife | — | Massachusetts |
| 9 | Incy E. Norcott | 31 | head | — | Massachusetts |
| 10 | William R. Mccarthy | 27 | lodger | Painter | Massachusetts |
| 11 | Francis A. Cass | 28 | head | Civil Engineer | Massachusetts |
| 12 | Louise E. Cass | 26 | wife | — | Massachusetts |
| 13 | John J. Brennan | 61 | father-in-law | Watchman | Massachusetts |
| 14 | Louise Brennan | 53 | mother-in-law | — | Massachusetts |
| 15 | Martin J. Brennan | 50 | head | Truck Driver | New York |
| 16 | Mary A. Brennan THIS PERSON | 49 | wife | — | Massachusetts |
| 17 | Charles T. Brennan | 25 | son | Clerk | Massachusetts |
| 18 | Margaret R. Brennan | 22 | daughter | Telephone Operator | Massachusetts |
| 19 | Dorothy M. Brennan | 20 | daughter | Twine Spinner | Massachusetts |
| 20 | Martin J. Jr. Brennan | 18 | son | — | Massachusetts |
| 21 | Mary E. Brennan | 15 | daughter | — | Massachusetts |
| 22 | Robert Brennan | 11 | son | — | Massachusetts |
| 23 | James J. Higgins | 52 | head | Watchman | Irish Free State |
| 24 | Mary V. Higgins | 56 | wife | — | Massachusetts |
| 25 | Arthur H. Lynds | 49 | head | Electric Welder | Massachusetts |
| 26 | Phyllis F. Lynds | 40 | wife | Laundress | Maine |
| 27 | Adeline G. Lynds | 20 | daughter | New Worker | Maine |
| 28 | Bernard J. Fallon | 58 | head | — | Irish Free State |
| 29 | Mary Murray | 61 | sister | — | Irish Free State |
| 30 | Harold T. Miller | 42 | head | Porter | Massachusetts |
| 31 | Janet Miller | 36 | wife | — | Massachusetts |
| 32 | Marilyn R. Miller | 17 | daughter | — | Massachusetts |
| 33 | Harold T. Jr. Miller | 13 | son | — | Massachusetts |
| 34 | Joseph F. Wall | 52 | head | Repair Man | Massachusetts |
| 35 | Bertha E. Wall | 50 | wife | — | Massachusetts |
| 36 | Roy J. Wall | 20 | son | 640 | Massachusetts |
| 37 | Catherine M. Wall | 16 | daughter | — | Massachusetts |
| 38 | Margaret A. Wall | 15 | daughter | — | Massachusetts |
| 39 | Rosanna Wall | 13 | daughter | — | Massachusetts |
| 40 | John R. Wall | 10 | son | — | Massachusetts |
Pedigree Summary
Mary
Gen 1 · 2 parents
~0.92
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)