JW
John Welch — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Illinois
Our Model Tree links this John Welch across the 1930 and 1940 US Censuses in Lake-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1899), then head of a 11-person household.
Age 41
b. ~1899
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Illinois |
| Surname | Welch |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Occupation | Laborer |
| Industry | Foundry |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 988 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Waukegan City |
| Est. Birth Year | ~1899 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Pauline Welch | Daughter | — | 7 | ~1933 |
| Viola Welch | Daughter | — | 16 | ~1924 |
| Maxine Welch | Daughter | — | 10 | ~1930 |
| John Welch | Head | — | 41 | ~1899 |
| Paul Welch | Son | — | 4 | ~1936 |
| Harold Welch | Son | — | 18 | ~1922 |
| Donald Welch | Son | — | 20 | ~1920 |
| Arthur Welch | Son | — | 8 | ~1932 |
| James Welch | Son | — | 13 | ~1927 |
| James Welch | Son | — | 21 | ~1919 |
| Blair Welch | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Lake, Illinois
Head, age 30
Lake, Illinois · implied b. ~1900 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 20 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Plasterer |
| Industry | Contracting |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 12,000 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Lake-County, Illinois
Head, age 41
Lake-County, Illinois · implied b. ~1899 — 11 household members
| Surname | Welch |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Occupation | Laborer |
| Industry | Foundry |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 988 |
| Highest Grade | 8 |
| 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 John Welch across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Welch
Head · 1940 · age 41 · b. ~1899 · 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 — Lake-County, Illinois
Open full size
1940 US Federal Census — Lake-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00830-00620)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Virginia Zimmer | 3 | Daughter | — | Illinois |
| 2 | Richard Zimmer | 1 | Son | — | Illinois |
| 3 | Paul G. Hollister | 45 | Head | Truck Driver | Illinois |
| 4 | Florence F. Hollister | 40 | Wife | — | Wisconsin |
| 5 | Paul G. Hollister | 18 | Son | Laborer | Illinois |
| 6 | Lester E. Hollister | 15 | Son | — | Illinois |
| 7 | George Pavelich | 43 | Head | Crane Operator | Yugoslavia |
| 8 | Helen M. Pavelich | 32 | Wife | — | Pennsylvania |
| 9 | Josephine C. Pavelich | 10 | Daughter | — | Illinois |
| 10 | George Jr. Pavelich | 8 | Son | — | Illinois |
| 11 | Peter J. Pavelich | 5 | Son | — | Illinois |
| 12 | Adolph Habonig | 26 | Head | Chemist | Illinois |
| 13 | Eleanor Habonig | 22 | Wife | — | Illinois |
| 14 | Charles K. Habonig | 25 | Head | Wire Drawer | Illinois |
| 15 | Bernice Habonig | 19 | Wife | — | Illinois |
| 16 | Charlene B. Habonig | 2 | Daughter | — | Illinois |
| 17 | George Darch | 24 | Head | Paint Sprayer | Illinois |
| 18 | Minnie F. Darch | 24 | Wife | — | Illinois |
| 19 | John Darch | 23 | Brother | Assembler | Illinois |
| 20 | John Welch THIS PERSON | 41 | Head | Laborer | Illinois |
| 21 | Blair C. Welch | 40 | Wife | — | Missouri |
| 22 | James R. Welch | 21 | Son | Laborer | Illinois |
| 23 | Donald J. Welch | 20 | Son | Die Setter | Illinois |
| 24 | Harold W. Welch | 18 | Son | Truck Driver | Illinois |
| 25 | Viola L. Welch | 16 | Daughter | — | Illinois |
| 26 | James C. Welch | 13 | Son | — | Illinois |
| 27 | Maxine L. Welch | 10 | Daughter | — | Illinois |
| 28 | Arthur L. Welch | 8 | Son | — | Illinois |
| 29 | Pauline D. Welch | 7 | Daughter | — | Illinois |
| 30 | Paul E. Welch | 4 | Son | — | Illinois |
| 31 | Ellie B. Stanley | 30 | Head | Laborer | Illinois |
| 32 | Sophia C. Stanley | 27 | Wife | — | Illinois |
| 33 | Richard Stanley | 4 | Son | — | Illinois |
| 34 | Ellie V. Stanley | 3 | Son | — | Illinois |
| 35 | Joseph Ryan | 44 | Head | Sand Blaster | Lithuania |
| 36 | Nellie R. Ryan | 46 | Wife | — | Poland |
| 37 | Felix T. Ryan | 25 | Son | Laborer | Illinois |
| 38 | Alex A. Ryan | 24 | Son | Laborer | Illinois |
| 39 | Edwin Ryan | 17 | Son | New Worker | Illinois |
| 40 | Genevieve Ryan | 14 | Daughter | — | 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)