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John Brennan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this John Brennan across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1912), then head of a 6-person household.
Age 28
b. ~1912
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Brennan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia City |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Occupation | supervisor |
| Industry | distributor |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Supervisor |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1912 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Geraldine Brennan | Daughter | — | 2 | ~1938 |
| Marie Brennan | Daughter | — | 4 | ~1936 |
| John Brennan | Head | — | 28 | ~1912 |
| Katherine Dawson | Other | — | 47 | ~1893 |
| George Dawson | Other | — | 48 | ~1892 |
| Mabel Brennan | Spouse | — | 27 | ~1913 |
Census Appearances
1920
Philadelphia, Pennsylvania
Other, age 9
Philadelphia, Pennsylvania · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | John H |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Philadelphia, Pennsylvania
Other, age 18
Philadelphia, Pennsylvania · implied b. ~1912 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brenen |
| Given Name | John |
| Relationship to Head | Brother |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Driver |
| Industry | Truck |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Head, age 28
Philadelphia-County, Pennsylvania · implied b. ~1912 — 6 household members
| Surname | Brennan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia City |
| 1935 Residence (County) | Philadelphia |
| Occupation | supervisor |
| Industry | distributor |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 John Brennan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Brennan
Head · 1940 · age 28 · b. ~1912 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03697-00606)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Howard Walker | 42 | Head | Bottler | Pennsylvania |
| 2 | Dorothy Walker | 37 | Wife | — | Pennsylvania |
| 3 | Bertha Cook | 67 | Mother-in-law | — | Pennsylvania |
| 4 | William Mechler | 53 | Head | Warehouse Man | Pennsylvania |
| 5 | Eleanor Mechler | 52 | Wife | — | Pennsylvania |
| 6 | George Buch | 62 | Head | Stationary Engineer | Pennsylvania |
| 7 | Mary Buch | 62 | Wife | — | Pennsylvania |
| 8 | Elizabeth Owen | 64 | Sister-in-law | — | Pennsylvania |
| 9 | John Gorman | 39 | Head | Foreman | New Jersey |
| 10 | Violet Gorman | 37 | Wife | Packer | Czechoslovakia |
| 11 | Mary Gorman | 16 | Daughter | — | Pennsylvania |
| 12 | Francis Gorman | 13 | Son | — | Pennsylvania |
| 13 | Cancel Gorman | None | — | — | — |
| 14 | Jessie Lyons | 35 | Head | Assembler | Virginia |
| 15 | Morris Lyons | 36 | Roomer | Shipping Clerk | Northern Ireland |
| 16 | Matherson Lyons | None | George | 20 | No 4 |
| 17 | Schmidt Lyons | None | Richard | 40 | No 8 |
| 18 | Hamill Lyons | None | William | — | No 8 |
| 19 | Margaret Fincham | 27 | Head | Examiner | Pennsylvania |
| 20 | Margaret Fincham | 7 | Daughter | — | Pennsylvania |
| 21 | Alice Largent | 44 | Head | Cleaner | England |
| 22 | Donald Largent | 10 | Son | — | Pennsylvania |
| 23 | Oscar Withopf | 38 | Head | Cabinet Maker | Germany |
| 24 | Rose Withopf | 38 | Wife | — | Germany |
| 25 | Julius Kaiser | 36 | Boarder | Tool & Dyer | Germany |
| 26 | John Brennan THIS PERSON | 28 | Head | Supervisor | Pennsylvania |
| 27 | Mabel Brennan | 27 | Wife | Embosser | Pennsylvania |
| 28 | Marie Joan Brennan | 4 | Daughter | — | Pennsylvania |
| 29 | Geraldine Brennan | 2 | Daughter | — | Pennsylvania |
| 30 | George Dawson | 48 | Father-in-law | Stationary Engineer | Pennsylvania |
| 31 | Katherine Dawson | 47 | Mother-in-law | — | Pennsylvania |
| 32 | Martin Achs | 52 | Head | Laborer | Rumania |
| 33 | Mary Achs | 52 | Wife | — | Rumania |
| 34 | Teresa Achs | 19 | Daughter | Clerk | Pennsylvania |
| 35 | Edward Mayberry | 27 | Son-in-law | Electrician | Pennsylvania |
| 36 | Mary Mayberry | 25 | Daughter | Topper | Pennsylvania |
| 37 | Theresa Schneider | 59 | Head | Housework | Rumania |
| 38 | Frederick Jassa | 67 | Head | — | Pennsylvania |
| 39 | Ida Jassa | 65 | Sister | Clerk | Pennsylvania |
| 40 | Lassie Richter | 70 | Sister | — | Pennsylvania |
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)