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John Regan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Regan across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 10-person household.
Age 51
b. ~1889
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Regan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Janitor |
| Industry | Apartment Building |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 2280 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Janitor |
| Township / Ward | Chicago |
| Est. Birth Year | ~1889 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| June Regan | Daughter | — | 13 | ~1927 |
| Roselyn Regan | Daughter | — | 18 | ~1922 |
| Beatrice Regan | Spouse | — | 47 | ~1893 |
| Bernice Regan | Daughter | — | 21 | ~1919 |
| John Regan | Head | — | 51 | ~1889 |
| John Regan | Son | — | 22 | ~1918 |
| Albert Koppe | Other | — | 23 | ~1917 |
| Edmond Regan | Son | — | 15 | ~1925 |
| Thomas Regan | Son | — | 16 | ~1924 |
| Margerite Regan | Daughter | — | 23 | ~1917 |
Census Appearances
1920
Cook, Illinois
Other, age 22
Cook, Illinois · implied b. ~1898 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Regan |
| Given Name | John |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1914 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Steamfitter |
| Industry | Electric Shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1919 |
| Birthplace (normalized) | ireland |
1930
Cook, Illinois
Other, age 37
Cook, Illinois · implied b. ~1893 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Regan |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1904 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Janitor |
| Industry | Public School |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Head, age 51
Cook-County, Illinois · implied b. ~1889 — 10 household members
| Surname | Regan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Janitor |
| Industry | Apartment Building |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 2280 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Regan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Regan
Head · 1940 · age 51 · b. ~1889 · 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
39 people indexed on this census page (nara:1940:m-t0627-01022-00806)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Hoeppel | 12 | Son | — | Illinois |
| 42 | Benjamin Smith | 32 | Head | Police Officer | Illinois |
| 43 | Mildred Smith | 31 | Wife | — | Illinois |
| 44 | Patsy Smith | 10 | Daughter | — | Illinois |
| 45 | Thomas Smith | 7 | Son | — | Illinois |
| 47 | John Regan THIS PERSON | 51 | Head | Janitor | Ireland |
| 48 | Beatrice Regan | 47 | Wife | — | Ireland |
| 49 | Margerite Regan | 23 | Daughter | — | Illinois |
| 50 | John Regan | 22 | Son | Delivery Boy | Illinois |
| 51 | Bernice Regan | 21 | Daughter | Telephone Oper | Illinois |
| 52 | Roselyn Regan | 18 | Daughter | Waitress | Illinois |
| 53 | Thomas Regan | 16 | Son | — | Illinois |
| 54 | Edmond Regan | 15 | Son | — | Illinois |
| 55 | June Regan | 13 | Daughter | — | Illinois |
| 56 | Albert Koppe | 23 | Lodger | Laborer | Illinois |
| 57 | Axel Dahlquist | 30 | Head | Partsman | Illinois |
| 58 | Evelyn Dahlquist | 29 | Wife | — | Illinois |
| 59 | Kenneth Grant | 52 | Head | Sales Engineer | Scotland |
| 60 | Genevieve Grant | 47 | Wife | — | Missouri |
| 61 | Kenneth Grant | 17 | Son | — | Wisconsin |
| 62 | George Carson | 34 | Head | Electrical Engineer | Illinois |
| 63 | Madeline Carson | 35 | Wife | — | Illinois |
| 64 | Mary Carson | 3 | Daughter | — | Illinois |
| 65 | Harvey Bellgard | 28 | Head | Pressman | Illinois |
| 66 | Suzanne Bellgard | 26 | Wife | Stenographer | Illinois |
| 67 | Clara Bellgard | 54 | Mother | Photographer | New York |
| 68 | Erich Ulm | 40 | Head | Sign & Display | Germany |
| 69 | Delyla Ulm | 42 | Wife | — | Illinois |
| 70 | George Ulm | 9 | Son | — | Germany |
| 71 | Edwin Ruehrdanz | 33 | Head | Inspector | Illinois |
| 72 | Marie Ruehrdanz | 34 | Wife | — | Illinois |
| 73 | Nancy Ruehrdanz | 5 | Daughter | — | Illinois |
| 74 | Raymond Beck | 31 | Head | National Representative | Illinois |
| 75 | Mary Beck | 30 | Wife | — | Illinois |
| 76 | Mary Beck | 2 | Daughter | — | Illinois |
| 77 | William Mccahey | 53 | Head | Salesman | Rhode Island |
| 78 | Virginia Mccahey | 46 | Wife | — | Rhode Island |
| 79 | Nicholas Tasto | 31 | Head | Teacher | Minnesota |
| 80 | Monica Tasto | 27 | Wife | — | Minnesota |
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)