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William Flynn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Flynn across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1882), then head of a 2-person household.
Age 58
b. ~1882
Male
Head
Born: Illinois
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Flynn |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1882 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Teresa Vonderhaar | Daughter | — | 23 | ~1917 |
| William Flynn | Head | — | 58 | ~1882 |
Census Appearances
1920
Cook, Illinois
Head, age 36
Cook, Illinois · implied b. ~1884 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | William J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Clerical Work |
| Industry | Bank |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Head, age 47
Cook, Illinois · implied b. ~1883 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | William J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 27 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Salesman |
| Industry | Investment |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 45 |
| Radio Set | R |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 58
Cook-County, Illinois · implied b. ~1882 — 2 household members
| Surname | Flynn |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Class of Worker | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Flynn across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Flynn
Head · 1940 · age 58 · b. ~1882 · Illinois
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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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01011-00743)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Martin | 15 | Daughter | — | Illinois |
| 2 | Linda Martin | 13 | Daughter | — | Illinois |
| 3 | James Martin | 10 | Son | — | Illinois |
| 4 | Agnes Martin | 9 | Daughter | — | Illinois |
| 5 | Joseph Martin | 4 | Son | — | Illinois |
| 6 | Cecilia Martin | 2 | Daughter | — | Illinois |
| 7 | Catherine Donahue | 74 | Aunt | — | Irish Free State |
| 8 | Charles Shuckle | 58 | Head | Baker | Germany |
| 9 | Mary Shuckle | 54 | Wife | — | Illinois |
| 10 | William Flynn THIS PERSON | 58 | Head | — | Illinois |
| 11 | Teresa Vonderhaar | 23 | Daughter | — | Illinois |
| 12 | William Bahr | 45 | Head | Lithographer | Illinois |
| 13 | Rose Bahr | 41 | Wife | — | Illinois |
| 14 | William Bahr | 14 | Son | — | Illinois |
| 15 | Richard Bahr | 13 | Son | — | Illinois |
| 16 | Rosemary Bahr | 11 | Daughter | — | Illinois |
| 17 | Paulette Bahr | 9 | Daughter | — | Illinois |
| 18 | Robert Bahr | 3 | Son | — | Illinois |
| 19 | Paul Becker | 35 | Head | Laborer | Illinois |
| 20 | Elizabeth Becker | 35 | Wife | — | Illinois |
| 21 | Donald Becker | 11 | Son | — | Illinois |
| 22 | John Becker | 9 | Son | — | Illinois |
| 23 | Joseph Lewis | 43 | Head | Tanner | Illinois |
| 24 | Beatrice Lewis | 40 | Wife | — | Illinois |
| 25 | Howard Lewis | 7 | Son | — | Illinois |
| 26 | Robert Lewis | 14 | Son | — | Illinois |
| 27 | Cecilia Clancy | 41 | Head | Office Clerk | Pennsylvania |
| 28 | Mary Clancy | 18 | Daughter | Calculator | Indiana |
| 29 | Francis Clancy | 16 | Son | — | Illinois |
| 30 | Thomas Clancy | 13 | Son | — | Illinois |
| 31 | No Other Population On Ashland In This Block | None | — | — | — |
| 32 | Includes Block (3) And Part Of Block (4) | None | — | — | — |
| 33 | Verna Porter | 58 | Head | Proprietor | Illinois |
| 34 | Harold Porter | 10 | Son | — | Illinois |
| 35 | Eula Guleserian | 36 | Sister | — | Illinois |
| 36 | Arthur Guleserian | 42 | In-law | Machinist | Armenia |
| 37 | Margaret Karr | 67 | Head | — | Illinois |
| 38 | Madge Karr | 38 | Daughter | Stenographer | Illinois |
| 39 | Matt Karr | 35 | Son | Clerk | Illinois |
| 40 | Henry Karr | 32 | Son | — | Illinois |
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)