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Margaret Brennan — 1930 US Census Record
Model Tree available1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Margaret Brennan across the 1910, 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents John & John — first a daughter (b.~1903), then head of a 4-person household.
Age 27
b. ~1903
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Brennan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada-English |
| Additional Details | |
| Occupation | Inspector |
| Industry | Watch Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Inspector |
| Township / Ward | Waltham City |
| Est. Birth Year | ~1903 |
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 1930 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| John Brennan | Head | — | 69 | ~1861 |
| Clarence Brennan | Son | — | 29 | ~1901 |
| Margaret Brennan | Daughter | — | 27 | ~1903 |
| Celia Brennan | Other | — | 57 | ~1873 |
Census Appearances
1910
Middlesex, Massachusetts
Daughter, age 7
Middlesex, Massachusetts · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Margaret M. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Can English |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Daughter, age 17
Middlesex, Massachusetts · implied b. ~1903 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada |
| Occupation | Machine Oper |
| Industry | River Factory |
| 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
Daughter, age 27
Middlesex, Massachusetts · implied b. ~1903 — 4 household members
| Surname | Brennan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada-English |
| Occupation | Inspector |
| Industry | Watch Factory |
| Class of Worker | W |
| 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 Margaret Brennan across 3 US Census years (1910, 1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage. Identified parents: father John Brennan (~0.92 confidence) and father John Brennan (~0.92 confidence) and mother Nellie Brennan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Brennan
b. ~1861
Source father
● Household
· direct · ~0.92
Father
John Brennan
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Nellie Brennan
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Brennan
Daughter · 1930 · age 27 · b. ~1903 · Massachusetts
★ You are viewing this record
Sibling
Clarence Brennan
Sibling · 1930 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel930:0372)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ernest Ross | 1 | Son | — | Massachusetts |
| 2 | Leo Gourley | 27 | Head | Pressman | New Hampshire |
| 3 | Rose Gourley | 29 | Wife-H | — | Canada-French |
| 4 | Walter Waterhouse | 10 | Step-son | — | Maine |
| 5 | Leo G. Gourley | 2 | Son | — | Massachusetts |
| 6 | Morris Dakin | 24 | Head | Watch Maker | Canada-English |
| 7 | Louise Dakin | 21 | Wife-H | — | Massachusetts |
| 8 | Ruth Dakin | 4 | Daughter | — | Massachusetts |
| 9 | Robert Dakin | 2 | Son | — | Massachusetts |
| 10 | Joanna Dakin | 0 | Daughter | — | Massachusetts |
| 11 | John Slaughlan | 32 | Head | Mason | Massachusetts |
| 12 | Esther Slaughlan | 26 | Wife-H | — | Vermont |
| 13 | John Slaughlan | 6 | Son | — | Massachusetts |
| 14 | Joseph Slaughlan | 4 | Son | — | Massachusetts |
| 15 | Mary Slaughlan | 1 | Daughter | — | Massachusetts |
| 16 | John Brennan | 69 | Head | — | Massachusetts |
| 17 | Celia Brennan | 57 | Wife-H | — | Canada-English |
| 18 | Clarence Brennan | 29 | Son | Chauffeur | Massachusetts |
| 19 | Margaret Brennan THIS PERSON | 27 | Daughter | Inspector | Massachusetts |
| 20 | Patrick Sloughlan | 57 | Head | Mason | Irish Free State |
| 21 | Margaret Sloughlan | 51 | Wife-H | — | Irish Free State |
| 22 | Mary Sloughlan | 28 | Daughter | Nurse Rn | Massachusetts |
| 23 | Catherine Sloughlan | 25 | Daughter | Presser | Massachusetts |
| 24 | Margaret Sloughlan | 16 | Daughter | — | Massachusetts |
| 25 | Francis Sloughlan | 11 | Son | — | Massachusetts |
| 26 | James Sloughlan | 20 | Son | Laborer | Massachusetts |
| 27 | Joan Sloughlan | 13 | Daughter | — | Massachusetts |
| 28 | Herbert B. Allen | 64 | Head | Painter | Massachusetts |
| 29 | Mary E. Allen | 64 | Wife-H | — | Massachusetts |
| 30 | George H. Allen | 41 | Son | Messenger | Massachusetts |
| 31 | Mary E. Jackson | 62 | Boarder | Adjuster | Maine |
| 32 | Raymond Leland | 25 | Lodger | Salesman | Massachusetts |
| 33 | Albert Sutton | 37 | Head | Milkman | Massachusetts |
| 34 | Mary Sutton | 42 | Wife-H | — | Massachusetts |
| 35 | Madeline Sutton | 7 | Daughter | — | Massachusetts |
| 36 | John Kellety | 57 | Head | Machinist | England |
| 37 | Catherine Kellety | 55 | Wife-H | — | Irish Free State |
| 38 | Frank Kellety | 25 | Son | Painter | England |
| 39 | John Kellety | 21 | Son | Electrician | England |
| 40 | Thomas Kellety | 18 | Son | — | Massachusetts |
| 41 | William B. Tow | 50 | Head | Salesman | Massachusetts |
| 42 | Harriet Tow | 49 | Wife-H | — | Massachusetts |
| 43 | Eleanor Tow | 20 | Daughter | Teacher | Massachusetts |
| 44 | Robert Tow | 17 | Son | — | Massachusetts |
| 45 | John Small | 68 | Head | Foreman | Irish Free State |
| 46 | Catherine Small | 58 | Wife-H | — | Irish Free State |
| 47 | George Small | 8 | Son | — | Massachusetts |
| 48 | Fred Small | 6 | Son | — | Massachusetts |
| 49 | Mary Griffin | 60 | Head-H | — | Irish Free State |
| 50 | James Griffin | 29 | Son | Gardner | Massachusetts |
Pedigree Summary
Margaret + 1 sibling
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)