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Joseph Brennan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hartford-County, Connecticut
Our Model Tree links this Joseph Brennan across the 1930 and 1940 US Censuses in Hartford-County, Connecticut (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 7-person household.
Age 22
b. ~1918
Male
Son
Born: Connecticut
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hartford-County, Connecticut |
| Surname | Brennan |
| Given Name | Joseph A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Connecticut |
| 1935 Residence (City) | East Hartford |
| 1935 Residence (County) | Hartford |
| Additional Details | |
| Occupation | Mechanic |
| Industry | Aircraft Plant |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1400 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
| Occupation | Mechanic |
| Township / Ward | East Hartford |
| Est. Birth Year | ~1918 |
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 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Marian Brennan | Daughter | — | 20 | ~1920 |
| Joseph Brennan | Son | — | 22 | ~1918 |
| Ambrose Brennan | Head | — | 40 | ~1900 |
| Kathryn Brennan | Daughter | — | 17 | ~1923 |
| John Brennan | Son | — | 18 | ~1922 |
| Lurline Brennan | Daughter | — | 13 | ~1927 |
| Florence Brennan | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Hartford, Connecticut
Son, age 12
Hartford, Connecticut · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Joseph A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Connecticut |
| Father's Birthplace | Connecticut |
| Mother's Birthplace | Connecticut |
| Can Read/Write | Yes |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1940
Hartford-County, Connecticut
Son, age 22
Hartford-County, Connecticut · implied b. ~1918 — 7 household members
| Surname | Brennan |
| Given Name | Joseph A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Connecticut |
| 1935 Residence (City) | East Hartford |
| 1935 Residence (County) | Hartford |
| Occupation | Mechanic |
| Industry | Aircraft Plant |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1400 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
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 Joseph Brennan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Brennan
Son · 1940 · age 22 · b. ~1918 · Connecticut
★ You are viewing this record
Sibling
Marian Brennan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathryn Brennan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lurline Brennan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Brennan
Sibling · 1940 · age 18
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
1940 US Federal Census — Hartford-County, Connecticut
Open full size
1940 US Federal Census — Hartford-County, Connecticut
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00502-00957)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James J. Kennedy | 59 | Head | Stationary Fireman | Irish Free State |
| 42 | Mary A. Kennedy | 54 | Wife | — | Irish Free State |
| 43 | William J. Kennedy | 20 | Son | Shipping Clerk | Connecticut |
| 44 | Loretta Kennedy | 18 | Daughter | — | Connecticut |
| 45 | Ambrose J. Brennan | 40 | Head | Clerk | Connecticut |
| 46 | Florence J. Brennan | 40 | Wife | — | Connecticut |
| 47 | Joseph A. Brennan THIS PERSON | 22 | Son | Mechanic | Connecticut |
| 48 | Marian T. Brennan | 20 | Daughter | Clerk | Connecticut |
| 49 | John F. Brennan | 18 | Son | — | Connecticut |
| 50 | Kathryn M. Brennan | 17 | Daughter | — | Connecticut |
| 51 | Lurline F. Brennan | 13 | Daughter | — | Connecticut |
| 52 | Thomas J. Stack | 31 | Head | Inspector | Connecticut |
| 53 | Dorothy M. Stack | 25 | Wife | — | Connecticut |
| 54 | Thomas J. Jr. Stack | 0 | Son | — | Connecticut |
| 55 | Lena M. Fortier | 67 | Mother | — | New York |
| 56 | Leo E. Fortier | 42 | Head | Assembler | Massachusetts |
| 57 | Teresa K. Fortier | 42 | Wife | — | Connecticut |
| 58 | Eugene R. Slifer | 31 | Head | Mechanic | Ohio |
| 59 | Enla L. Slifer | 31 | Wife | — | Connecticut |
| 60 | Beverly Ann Slifer | 4 | Daughter | — | Connecticut |
| 61 | Kirstine Christiansen | 72 | Head | — | Denmark |
| 62 | Mary J. Christiansen | 37 | Daughter | Clerk | Connecticut |
| 63 | Margaret D. Parry | 49 | Head | Cleaning | North Wales |
| 64 | Margaret J. Parry | 17 | Daughter | — | Connecticut |
| 65 | Ruth J. Parry | 15 | Daughter | — | Connecticut |
| 66 | Israel Rendeiro | 37 | Head | Hair Stylist | Portugal |
| 67 | Irene B. Rendeiro | 35 | Wife | — | Massachusetts |
| 68 | Andre J. Rendeiro | 4 | Son | — | New York |
| 69 | Dayton H. Whipple | 37 | Head | Auto Mechanic | New York |
| 70 | Dorothy S. Whipple | 36 | Wife | — | New York |
| 71 | Dayton H. Jr. Whipple | 4 | Son | — | Connecticut |
| 72 | Ralph Morton | 65 | Head | Engineer | Massachusetts |
| 73 | Margaret S. Morton | 54 | Wife | — | New York |
| 74 | Clarence M. Bagg | 38 | Head | Inspection | Massachusetts |
| 75 | Edith D. Bagg | 38 | Wife | — | Massachusetts |
| 76 | Eleanor A. Bagg | 15 | Daughter | — | Massachusetts |
| 77 | Mildred S. Bagg | 6 | Daughter | — | Connecticut |
| 78 | Ella S. Olmsted | 62 | Head | Retired | Connecticut |
| 79 | May T. Sanford | 59 | Roomer | Companion | Connecticut |
| 80 | — | None | — | — | — |
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)