JB
James Brennan — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Louis-County, Missouri
Our Model Tree links this James Brennan across the 1920, 1930 and 1940 US Censuses in St.-Louis-County, Missouri (XGBoost, ~Confirmed), with identified parents James & Bridget — first a son (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Male
Son
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Missouri |
| Surname | Brennan |
| Given Name | James Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Richmond Heights City |
| 1935 Residence (County) | St. Louis |
| Additional Details | |
| Occupation | Salesman |
| Industry | Insurance Co |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 1000 |
| Highest Grade | Hs 3-20 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Salesman |
| Township / Ward | Richmond Heights City |
| Est. Birth Year | ~1910 |
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 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Brennan | Daughter | — | 24 | ~1916 |
| James Brennan | Head | — | 64 | ~1876 |
| James Brennan | Son | — | 30 | ~1910 |
| Dredge Brennan | Spouse | — | 60 | ~1880 |
Census Appearances
1920
St Louis, …
Son, age 10
St Louis, Missouri · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
St Louis, …
Son, age 20
St Louis, Missouri · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | James A. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | Cement Contractor |
| Industry | Own business |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-County, Missouri
Son, age 30
St.-Louis-County, Missouri · implied b. ~1910 — 4 household members
| Surname | Brennan |
| Given Name | James Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Richmond Heights City |
| 1935 Residence (County) | St. Louis |
| Occupation | Salesman |
| Industry | Insurance Co |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 1000 |
| Highest Grade | Hs 3-20 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 James Brennan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Brennan (~0.92 confidence) and mother Bridget Brennan (~0.92 confidence) and mother Dredge 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. ~1876
Source father
● Household
· direct · ~0.92
Mother
Bridget Brennan
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Dredge Brennan
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Bridget Brennan
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Brennan
Son · 1940 · age 30 · b. ~1910 · Missouri
★ You are viewing this record
Sibling
Dorothy Brennan
Sibling · 1940 · age 24
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 — St.-Louis-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02150-00902)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Cravens | 53 | Head | Bookkeeper | Missouri |
| 42 | Celia Cravens | 53 | Wife | — | Kentucky |
| 43 | Margie Tharp | 49 | Head | — | Missouri |
| 44 | Dorothy Tharp | 32 | Daughter | Decorator | Missouri |
| 45 | Orrin Lewis | 12 | Lodger | — | Missouri |
| 46 | Arthur W Tyler | 50 | Head | Builder | Arkansas |
| 47 | Mary Tyler | 49 | Wife | — | Illinois |
| 48 | Mary Jane Tyler | 22 | Daughter | Statistician | Missouri |
| 49 | David Tyler | 15 | Son | — | Missouri |
| 50 | Thomas Tyler | 10 | Son | — | Missouri |
| 51 | William E Logan | 34 | Head | Manager | Kansas |
| 52 | Pauline Logan | 37 | Wife | — | Missouri |
| 53 | Paul Logan | 5 | Son | — | Missouri |
| 54 | Robert L Brown | 37 | Head | Lawyer | Tennessee |
| 55 | Mabel M Brown | 36 | Wife | — | Missouri |
| 56 | Robert B Brown | 3 | Son | — | Missouri |
| 57 | Susan Brown | 1 | Daughter | — | Missouri |
| 58 | Charles Guthrie | 40 | Head | Area Engineer | Kentucky |
| 59 | Lena Guthrie | 39 | Wife | — | Missouri |
| 60 | Louise Guthrie | 7 | Daughter | — | Missouri |
| 61 | James A Brennan | 64 | Head | — | Missouri |
| 62 | Dredge Brennan | 60 | Wife | — | Missouri |
| 63 | James Jr Brennan THIS PERSON | 30 | Son | Salesman | Missouri |
| 64 | Dorothy Brennan | 24 | Daughter | Secretary | Missouri |
| 65 | John Steward | 53 | Head | Plumber | Missouri |
| 66 | Lucille Steward | 21 | Daughter | Secretary | Missouri |
| 67 | Bernard Steward | 19 | Son | Clerk | Missouri |
| 68 | Robert Steward | 16 | Son | Delivery Boy | Missouri |
| 69 | Rose Mary Steward | 11 | Daughter | — | Missouri |
| 70 | Amelia Kadel | 70 | Mother-in-law | — | Missouri |
| 71 | Christian Wintel | 57 | Head | Sign Painter | Missouri |
| 72 | Elna C Wintel | 42 | Wife | — | Illinois |
| 73 | George Henning | 53 | Head | Interior Painter | Ohio |
| 74 | Ottilie Henning | 68 | Wife | — | Missouri |
| 75 | John H Foehr | 46 | Head | Salesman | Missouri |
| 76 | Bessie M Foehr | 48 | Wife | — | Missouri |
| 77 | Audrey J Foehr | 22 | Daughter | Model | Missouri |
| 78 | Roy Mueller | 27 | Head | Salesman | Illinois |
| 79 | Baine Mueller | 27 | Wife | Bookkeeper | Missouri |
| 80 | Thomas Fagin | 54 | Head | Salesman | Illinois |
Related Census Records
Pedigree Summary
James + 1 sibling
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 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)