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Mary Brennan — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Mary Brennan across the 1920 and 1930 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1891), then head of a 10-person household.
Age 39
b. ~1891
Female
Spouse
Born: Massachusetts
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Brennan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 25 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| 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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Theresa Brennan | Daughter | — | 4 | ~1926 |
| Rita Brennan | Daughter | — | 1 | ~1929 |
| Edna Brennan | Daughter | — | 11 | ~1919 |
| Mary Brennan | Daughter | — | 6 | ~1924 |
| Helen Brennan | Daughter | — | 12 | ~1918 |
| Lawrence Brennan | Head | — | 37 | ~1893 |
| John Brennan | Son | — | 9 | ~1921 |
| William Brennan | Son | — | 7 | ~1923 |
| John Brennan | Son | — | 3 | ~1927 |
| Mary Brennan | Spouse | — | 39 | ~1891 |
Census Appearances
1920
Suffolk, Massachusetts
Spouse, age 30
Suffolk, Massachusetts · implied b. ~1890 — 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 | 30 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Spouse, age 39
Suffolk, Massachusetts · implied b. ~1891 — 10 household members
| Surname | Brennan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 25 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| 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 2 US Census years (1920 and 1930) in Suffolk, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Brennan
Spouse · 1930 · age 39 · b. ~1891 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Suffolk, Massachusetts
Open full size
1930 US Federal Census — Suffolk, Massachusetts
Page Contents
48 people indexed on this census page (ia:1930:massachusettscensus00reel949:0056)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Bridget M. | 85 | Head | None | Maine |
| 53 | John J. Lundy | 65 | Head | Matthews | Newfoundland |
| 54 | Mary Lundy | 78 | Wife | None | Norway |
| 55 | Olaf Svenson | 75 | Boarder | None | Norway |
| 56 | Lawrence Brennan | 37 | Head | Laborer | Massachusetts |
| 57 | Mary Brennan THIS PERSON | 39 | Wife | None | Massachusetts |
| 58 | Helen C. Brennan | 12 | Daughter | None | Massachusetts |
| 59 | Edna E. Brennan | 11 | Daughter | None | Massachusetts |
| 60 | John J. Brennan | 9 | Son | None | Massachusetts |
| 61 | William F. Brennan | 7 | Son | None | Massachusetts |
| 62 | Mary Brennan | 6 | Daughter | None | Massachusetts |
| 63 | Theresa Brennan | 4 | Daughter | None | Massachusetts |
| 64 | John Brennan | 3 | Son | None | Massachusetts |
| 65 | Rita Brennan | 1 | Daughter | None | Massachusetts |
| 66 | Joseph E. Corliss | 48 | Head | Watchman | Massachusetts |
| 67 | Cecilia M. Corliss | 45 | Wife | None | Ireland |
| 68 | Elizabeth Corliss | 16 | Daughter | None | Massachusetts |
| 69 | Joseph H. Corliss | 14 | Son | None | Massachusetts |
| 70 | Oscar M. Frank | 68 | Head | Carver | Norway |
| 71 | Janelle Frank | 50 | Sister | None | New York |
| 72 | Ida J. Mahoney | 52 | Head | Mistress | New Jersey |
| 74 | Nellie Cotter | 73 | Head | None | Ireland |
| 75 | Miriam G. Cotter | 47 | Daughter | Clerk | Massachusetts |
| 76 | Morris J. Cotter | 41 | Son | General Meter | Massachusetts |
| 77 | John D. Cotter | 37 | Son | Telephone | Massachusetts |
| 78 | Otto J. Erikson | 35 | Head | Machinist | Sweden |
| 79 | Agnes E. Erikson | 29 | Wife | None | Sweden |
| 80 | John J. Kelley | 26 | Head | Machinist | Massachusetts |
| 81 | Eileen C. Kelley | 24 | Wife | None | Sweden |
| 82 | Doris E. Kelley | 0 | Daughter | None | Massachusetts |
| 83 | George Mcvicar | 34 | Head | Clerk | Canada English |
| 84 | Florence Mcvicar | 29 | Wife | None | Canada English |
| 85 | Ruth Mcvicar | 3 | Daughter | None | Massachusetts |
| 86 | Mark K. Clancy | 31 | Head | Chauffeur | Massachusetts |
| 87 | Elsie G. Clancy | 31 | Wife | None | Massachusetts |
| 88 | Ruth G. Clancy | 10 | Daughter | None | Massachusetts |
| 89 | Mark Clancy | 8 | Son | None | Massachusetts |
| 90 | Robert Clancy | 4 | Son | None | Massachusetts |
| 91 | John M. Hayward | 50 | Head | Laborer | Massachusetts |
| 92 | Margaret Hayward | 47 | Wife | None | New York |
| 93 | Hugh J. Macdonald | 53 | Head | Printer | Nova Scotia |
| 94 | Catherine E. Macdonald | 75 | Mother | Housekeeper | Nova Scotia |
| 95 | Margaret M. Macdonald | 15 | Daughter | None | Massachusetts |
| 96 | Theresa E. Macdonald | 13 | Daughter | None | Massachusetts |
| 97 | John J. Driscoll | 30 | Head | Helper | Massachusetts |
| 98 | Mary C. Driscoll | 24 | Wife | None | Massachusetts |
| 99 | Mary C. Driscoll | 4 | Daughter | None | Massachusetts |
| 100 | Margaret Millard | 66 | Head | None | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)