TB
Thomas Brennan — 1930 US Census Record
Model Tree available1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Thomas Brennan across the 1900, 1910, 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents James & Thomas — first a head (b.~1875), then head of a 7-person household.
Age 55
b. ~1875
Male
Head
Born: Massachusetts
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Brennan |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 23 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Occupation | Manager |
| Industry | Legal |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 50 |
| Radio Set | R |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Manager |
| Township / Ward | Cambridge City |
| Est. Birth Year | ~1875 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Rufus Brennan | Son | — | 8 | ~1922 |
| Alice Brennan | Daughter | — | 14 | ~1916 |
| Clark Brennan | Son | — | 11 | ~1919 |
| James Walsh | Other | — | 83 | ~1847 |
| Mary Walsh | Other | — | 53 | ~1877 |
| Agnes Brennan | Spouse | — | 46 | ~1884 |
| Thomas Brennan | Head | — | 55 | ~1875 |
Census Appearances
1900
Middlesex, Massachusetts
Son, age 28
Middlesex, Massachusetts · implied b. ~1872 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Thomas F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Birth Month | Mar |
| Birth Year | 1872 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1910
Middlesex, Massachusetts
Son, age 37
Middlesex, Massachusetts · implied b. ~1873 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Thomas F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Lawyer |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Head, age 45
Middlesex, Massachusetts · implied b. ~1875 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Thomas F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Lawyer |
| Industry | Own office |
| Class of Worker | oa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Head, age 55
Middlesex, Massachusetts · implied b. ~1875 — 7 household members
| Surname | Brennan |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 23 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Manager |
| Industry | Legal |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 50 |
| Radio Set | R |
| 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 Thomas Brennan across 4 US Census years (1900, 1910, 1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage. Identified parents: father James Brennan (~0.92 confidence) and father Thomas Brennan (~0.92 confidence) and mother Bridget Brennan (~0.92 confidence) and mother Bridget Brennan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Brennan
b. ~1840
Source father
● Household
· direct · ~0.92
Father
Thomas Brennan
b. ~1832
Source father
● Household
· direct · ~0.92
Mother
Bridget Brennan
b. ~1852
Source mother
● Household
· direct · ~0.92
Mother
Bridget Brennan
b. ~1834
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Brennan
Head · 1930 · age 55 · b. ~1875 · Massachusetts
★ You are viewing this record
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
49 people indexed on this census page (ia:1930:massachusettscensus00reel916:0980)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Louis F. Lally | 43 | Head | Foreman | Irish Free State |
| 52 | Elizabeth Lally | 47 | Wife | — | Irish Free State |
| 53 | Marie Lally | 22 | Daughter | Stenog | Massachusetts |
| 54 | Arthur Lally | 20 | Son | Clerk | Massachusetts |
| 55 | Joseph W. Lally | 15 | Son | — | Massachusetts |
| 56 | James Day | 67 | Head | Manager | Kentucky |
| 57 | Bernice Day | 24 | Servant | Cook | Canada-English |
| 58 | Emily W. Riley | 78 | Head | — | Massachusetts |
| 59 | Gertrude A. Riley | 72 | Sister | — | Massachusetts |
| 60 | Charles R. Root | 45 | Head | Professor | Michigan |
| 61 | Mary E. Lugin | 43 | Lodger | — | Massachusetts |
| 63 | George A. Davis | 26 | Head | Janitor | British West Indies |
| 64 | Leta M. Davis | 29 | Wife | — | Nova Scotia |
| 65 | Margaret O'Sullivan | 52 | Head | — | Massachusetts |
| 66 | Ella M. O'Sullivan | 53 | Wife-H | — | Canada-English |
| 67 | George O'Sullivan | 19 | Son | — | Massachusetts |
| 68 | Stanley D. Burt | 29 | Head | Carpenter | Vermont |
| 69 | Katherine Burt | 27 | Wife | — | Canada-English |
| 70 | Walter J. Scully | 32 | Head | Foreman | Massachusetts |
| 71 | Helen M. Scully | 28 | Wife | Secretary | Massachusetts |
| 72 | Walter J. Scully | 7 | Son | — | Massachusetts |
| 73 | Catherine Cronin | 70 | Servant | — | Canada-English |
| 74 | Alice Cronin | 68 | Servant | — | Canada-English |
| 75 | Lois M. Lyons | 30 | Servant | Auditor | Massachusetts |
| 76 | Edwin Hamilton | 39 | Head | Druggist | Massachusetts |
| 77 | Alice S. Hamilton | 42 | Wife | — | Rhode Island |
| 78 | William A. Hamilton | 20 | Son | Clerk | Massachusetts |
| 79 | George G. Hamilton | 17 | Son | — | Massachusetts |
| 80 | Robert A. Hamilton | 12 | Son | — | Massachusetts |
| 81 | Thomas Brennan THIS PERSON | 55 | Head | Manager | Massachusetts |
| 82 | Agnes M. Brennan | 46 | Wife | — | Massachusetts |
| 83 | Alice B. Brennan | 14 | Daughter | — | Massachusetts |
| 84 | Clark Brennan | 11 | Son | — | Massachusetts |
| 85 | Rufus Brennan | 8 | Son | — | Massachusetts |
| 86 | James Walsh | 83 | Father-in-law | — | Irish Free State |
| 87 | Mary F. Walsh | 53 | Sister-in-law | Bookkeeper | Massachusetts |
| 88 | Frank Jerry | 57 | Head | Printer | Massachusetts |
| 89 | Annie A. Gordon | 53 | Head | — | Irish Free State |
| 90 | Arthur J. Gordon | 25 | Son | Ant Agt | Massachusetts |
| 91 | Thomas Foley | 35 | Lodger | Painter | Irish Free State |
| 92 | James L. Lally | 30 | Lodger | Janitor | Irish Free State |
| 93 | Florence Card | 40 | Lodger | Waitress | Massachusetts |
| 94 | Nathan R. Davis | 48 | Lodger | Engineer | Pennsylvania |
| 95 | Kathleen V. Macbeth | 58 | Head-H | — | South Carolina |
| 96 | Mary F. Macbeth | 26 | Daughter | Teacher | Massachusetts |
| 97 | John J. Macbeth | 22 | Son | Salesman | Massachusetts |
| 98 | Thomas W. Macbeth | 21 | Son | Clerk | Massachusetts |
| 99 | Norbert A. Macbeth | 19 | Son | — | Massachusetts |
| 100 | Claudia R. Macbeth | 13 | Daughter | — | Massachusetts |
Pedigree Summary
Thomas
Gen 1 · 4 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)