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John Mueller — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Mueller across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 6-person household.
Age 16
b. ~1924
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Mueller |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1924 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Dian Mueller | Daughter | — | 2 | ~1938 |
| Dorothy Mueller | Daughter | — | 15 | ~1925 |
| John Mueller | Head | — | 44 | ~1896 |
| John Mueller | Son | — | 16 | ~1924 |
| Daniel Mueller | Son | — | 2 | ~1938 |
| Rose Mueller | Spouse | — | 39 | ~1901 |
Census Appearances
1930
Cook, Illinois
Son, age 7
Cook, Illinois · implied b. ~1923 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mueller |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 16
Cook-County, Illinois · implied b. ~1924 — 6 household members
| Surname | Mueller |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | Hs 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 John Mueller across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mueller
Son · 1940 · age 16 · b. ~1924 · Illinois
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Sibling
Daniel Mueller
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dian Mueller
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Mueller
Sibling · 1940 · age 15
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 — 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-t0627-00994-00939)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Petrunic | 19 | Son | Truck Driver | Illinois |
| 2 | Andrew Petrunic | 17 | Son | Apprentice | Illinois |
| 3 | Clarence Petrunic | 15 | Son | — | Illinois |
| 4 | Joseph Petrunic | 11 | Son | — | Illinois |
| 5 | Margaret Petrunic | 27 | Daughter | File Clerk | Illinois |
| 6 | Ignatius Swatko | 58 | Brother | Laborer | Germany |
| 7 | Lawrence Nasser | 52 | Head | Truck Driver | Germany |
| 8 | Emily Nasser | 35 | Wife | — | Germany |
| 9 | John Nasser | 20 | Son | Retail Clerk | Illinois |
| 10 | Lawrence Nasser | 11 | Son | — | Illinois |
| 11 | Adolph Nielner | 68 | Brother | — | Germany |
| 12 | Carl Rees | 41 | Lodger | Truck Helper | Germany |
| 13 | Andrew Hines | 19 | Lodger | — | Virginia |
| 14 | Ralph Van Etten | 58 | Head | Steward | Ohio |
| 15 | Margaret Van Etten | 44 | Wife | — | Illinois |
| 16 | Ralph Jr. Van Etten | 11 | Son | — | Illinois |
| 17 | Lorraine Van Etten | 9 | Daughter | — | Illinois |
| 18 | Sam Sarabella | 26 | Step son | Polisher | Illinois |
| 19 | James Sarabella | 19 | Step son | Laborer | Illinois |
| 20 | Edward Sarabella | 15 | Step son | — | Illinois |
| 21 | Josephine Sarabella | 20 | Daughter | — | Illinois |
| 22 | John Mueller | 44 | Head | Clerk | Illinois |
| 23 | Rose Mueller | 39 | Wife | — | Illinois |
| 24 | John Jr. Mueller THIS PERSON | 16 | Son | — | Illinois |
| 25 | Dorothy Mueller | 15 | Daughter | — | Illinois |
| 26 | Daniel Mueller | 2 | Son | — | Illinois |
| 27 | Dian Mueller | 2 | Daughter | — | Illinois |
| 28 | John Spelger | 35 | Head | Laborer | Illinois |
| 29 | Robert Spelger | 13 | Son | — | Illinois |
| 30 | Richard Vander Hooven | 46 | Head | — | Denmark |
| 31 | Catherine Theil | 21 | Daughter | General Office | Illinois |
| 32 | Anita Gaylord | 45 | Lodger | Machinist | Illinois |
| 33 | Thora Hansen | 71 | Head | — | Denmark |
| 34 | Michael Navin | 43 | Lodger | Salesman | New York |
| 35 | Bernard Cummings | 25 | Lodger | Lawyer | Illinois |
| 36 | Benjamin Swartz | 25 | Lodger | Stock Clerk | Illinois |
| 37 | Marius Petersen | 65 | Head | Wood Turner | Denmark |
| 38 | Marie Petersen | 59 | Wife | — | Denmark |
| 39 | Michael Sorenson | 40 | Head | Paint Mixer | Norway |
| 40 | Anna Marie Sorenson | 33 | Wife | Assembler | Norway |
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)