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William Brennan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Clair-County, Michigan
Our Model Tree links this William Brennan across the 1930 and 1940 US Censuses in St.-Clair-County, Michigan (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 10-person household.
Age 11
b. ~1929
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Michigan |
| Surname | BRENNAN |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | KENOCKEE |
| 1935 Residence (County) | SAINT CLAIR |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Kenockee |
| Est. Birth Year | ~1929 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Eignoy Brennan | Daughter | — | 7 | ~1933 |
| Rose Brennan | Daughter | — | 3 | ~1937 |
| William Brennan | Son | — | 11 | ~1929 |
| Gerald Brennan | Son | — | 4 | ~1936 |
| William Brennan | Head | — | 41 | ~1899 |
| Eugene Brennan | Son | — | 8 | ~1932 |
| Charles Brennan | Son | — | 1 | ~1939 |
| Mary Brennan | Spouse | — | 35 | ~1905 |
| Lorane Brennan | Daughter | — | 5 | ~1935 |
| Anna Brennan | Daughter | — | 10 | ~1930 |
Census Appearances
1930
St Clair, …
Son, age 1
St Clair, Michigan · implied b. ~1929 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
St.-Clair-County, Michigan
Son, age 11
St.-Clair-County, Michigan · implied b. ~1929 — 10 household members
| Surname | BRENNAN |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | KENOCKEE |
| 1935 Residence (County) | SAINT CLAIR |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 William Brennan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Brennan
Son · 1940 · age 11 · b. ~1929 · Michigan
★ You are viewing this record
Sibling
Anna Brennan
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Brennan
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Brennan
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Brennan
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eignoy Brennan
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorane Brennan
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Brennan
Sibling · 1940 · age 4
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.-Clair-County, Michigan
Open full size
1940 US Federal Census — St.-Clair-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01815-00537)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph Brennan | 64 | Brother | Farm Helper | Michigan |
| 42 | Florence Brennan | 27 | Sister | Housekeeper | Michigan |
| 43 | William Brennan | 41 | Head | Farmer | Michigan |
| 44 | Mary Brennan | 35 | Wife | — | Michigan |
| 45 | William Jr. Brennan THIS PERSON | 11 | Son | — | Michigan |
| 46 | Anna M. Brennan | 10 | Daughter | — | Michigan |
| 47 | Eugene Brennan | 8 | Son | — | Michigan |
| 48 | Eignoy | Eigney Brennan | 7 | Daughter | — | Michigan |
| 49 | Lorane Brennan | 5 | Daughter | — | Michigan |
| 50 | Gerald Brennan | 4 | Son | — | Michigan |
| 51 | Rose Brennan | 3 | Daughter | — | Michigan |
| 52 | Charles Brennan | 1 | Son | — | Michigan |
| 53 | David G. Wixson | 57 | Head | Farmer | Michigan |
| 54 | Sylvia Wixson | 48 | Wife | — | Michigan |
| 55 | Kenneth Wixson | 28 | Son | Truck Driver | Michigan |
| 56 | Jennie Wixson | 23 | Daughter | Secretary | Michigan |
| 57 | James Wixson | 21 | Son | Machine Operator | Michigan |
| 58 | Robert Wixson | 14 | Son | — | Michigan |
| 59 | Norma Wixson | 11 | Daughter | — | Michigan |
| 60 | Henry Stake | 76 | Head | Farmer | New York |
| 61 | Vernon Stake | 44 | Son | — | Ohio |
| 62 | Grace Stake | 43 | Daughter-in-law | — | Pennsylvania |
| 63 | Stephan Gillick | 64 | Head | Farmer | Yugoslavia |
| 64 | Marcella Gillick | 57 | Wife | — | Yugoslavia |
| 65 | Robert Getchell | 14 | Lodger | — | Ohio |
| 66 | Alfred G. Mackey | 42 | Head | Farmer | Michigan |
| 67 | Margaret Mackey | 33 | Wife | — | Illinois |
| 68 | Ellen Mackey | 10 | Daughter | — | Michigan |
| 69 | Mary Mackey | 9 | Daughter | — | Michigan |
| 70 | Margaret Mackey | 8 | Daughter | — | Michigan |
| 71 | John Mackey | 7 | Son | — | Michigan |
| 72 | Patricia Mackey | 6 | Daughter | — | Michigan |
| 73 | Kathleen Mackey | 1 | Daughter | — | Michigan |
| 74 | Joseph Biela | 55 | Lodger | — | Michigan |
| 75 | Walter Urbanek | 15 | Lodger | — | Michigan |
| 76 | Frank Griffith | 45 | Head | Farmer | Michigan |
| 77 | James B. Mackey | 55 | Head | Farmer | Michigan |
| 78 | Joseph F. Mackey | 76 | Head | Farmer | Canada |
| 79 | Kate Mackey | 72 | Wife | — | Michigan |
| 80 | Eva Ward | 65 | Adopted | — | Michigan |
Related Census Records
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)