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William Flynn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Indiana
Our Model Tree links this William Flynn across the 1930 and 1940 US Censuses in Lake-County, Indiana (XGBoost, ~Confirmed) — first a head (b.~1905), then head of a 9-person household.
Age 35
b. ~1905
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Indiana |
| Surname | Flynn |
| Given Name | William J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Gary city |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Occupation | mill foreman |
| Industry | steel mill |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 4800 |
| Highest Grade | C-2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Mill Foreman |
| Township / Ward | Gary City |
| Est. Birth Year | ~1905 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Mary Flynn | Daughter | — | 11 | ~1929 |
| Joan Flynn | Daughter | — | 5 | ~1935 |
| Teresa Flynn | Daughter | — | 14 | ~1926 |
| Barbara Flynn | Daughter | — | 5 | ~1935 |
| Suzanne Flynn | Daughter | — | 6 | ~1934 |
| William Flynn | Head | — | 35 | ~1905 |
| Billy Flynn | Son | — | 12 | ~1928 |
| Daniel Flynn | Son | — | 9 | ~1931 |
| Catherine Flynn | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Lake, Indiana
Head, age 26
Lake, Indiana · implied b. ~1904 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 20 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Helper |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 75 |
| Radio Set | R |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Lake-County, Indiana
Head, age 35
Lake-County, Indiana · implied b. ~1905 — 9 household members
| Surname | Flynn |
| Given Name | William J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Gary city |
| 1935 Residence (County) | Lake |
| Occupation | mill foreman |
| Industry | steel mill |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 4800 |
| Highest Grade | C-2 |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Flynn
Head · 1940 · age 35 · b. ~1905 · Indiana
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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 — Lake-County, Indiana
Open full size
1940 US Federal Census — Lake-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01119-00941)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles B. Jones | 42 | Head | Ot | Indiana |
| 2 | Incy M. Jones | 43 | Wife | H | Illinois |
| 3 | Charles Jones | 16 | Son | S | Indiana |
| 4 | Marjorie Jones | 15 | Daughter | S | Indiana |
| 5 | Doris Jones | 11 | Daughter | S | Indiana |
| 6 | Donna Jones | 10 | Daughter | S | Indiana |
| 7 | Newton Jones | 9 | Son | S | Indiana |
| 8 | Jewel Jones | 7 | Daughter | S | Indiana |
| 9 | Jerry Jones | 6 | Son | S | Indiana |
| 10 | Stanley C. Prosser | 44 | Head | Clerk | Indiana |
| 11 | Laura D. Prosser | 40 | Wife | H | Indiana |
| 12 | William J. Prosser | 19 | Son | S | Wisconsin |
| 13 | Carl A. Frech | 43 | Head | Medical Doctor | Indiana |
| 14 | Helen Frech | 43 | Wife | H | Indiana |
| 15 | Dorothy A. Frech | 19 | Daughter | S | Indiana |
| 16 | Edward Fitzgerald | 58 | Head | Office | Indiana |
| 17 | Camillia D. Fitzgerald | 56 | Wife | H | Pennsylvania |
| 18 | Pierre Jr. Fitzgerald | 22 | Son | S | Indiana |
| 19 | Leonard J. Fitzgerald | 18 | Son | S | Indiana |
| 20 | Louis Fitzgerald | 9 | Son | S | Illinois |
| 21 | William J. Flynn THIS PERSON | 35 | Head | Mill Foreman | Illinois |
| 22 | Catherine Flynn | 36 | Wife | H | Wisconsin |
| 23 | Teresa Ann Flynn | 14 | Daughter | S | Indiana |
| 24 | Billy Flynn | 12 | Son | S | Indiana |
| 25 | Mary Lou Flynn | 11 | Daughter | S | Indiana |
| 26 | Daniel Flynn | 9 | Son | S | Indiana |
| 27 | Suzanne Flynn | 6 | Daughter | S | Indiana |
| 28 | Joan Flynn | 5 | Daughter | — | Indiana |
| 29 | Barbara Flynn | 5 | Daughter | — | Indiana |
| 30 | Thomas J. Connor | 48 | Head | Assistant Supervisor | Indiana |
| 31 | Marie J. Connor | 46 | Wife | H | Illinois |
| 32 | Mary F. Connor | 15 | Daughter | S | Illinois |
| 33 | James Connor | 13 | Son | S | Illinois |
| 34 | Jack Connor | 9 | Son | S | Illinois |
| 35 | Michael J. Aussin | 67 | Lodger | Night Clerk | Illinois |
| 36 | A. C. Felsenbaumer | 53 | Head | Dentist | Illinois |
| 37 | Helen M. Felsenbaumer | 48 | Wife | H | Illinois |
| 38 | Nora Prendegast | 65 | Lodger | H | Illinois |
| 39 | Nora Quinn | 66 | Head | H | Pennsylvania |
| 40 | John P. Quinn | 29 | Son | Laborer | Ohio |
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)