JK
John Keefe — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Keefe across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 8-person household.
Age 21
b. ~1919
Male
Son
Born: Canada
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | KEEFE |
| Given Name | JOHN |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Canada |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Clerk |
| Industry | Mail Order |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 450 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth Country | Canada |
| Birthplace (normalized) | canada |
| Occupation | Clerk |
| Township / Ward | Chicago |
| Est. Birth Year | ~1919 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Keefe | Son | — | 21 | ~1919 |
| Margaret Keefe | Daughter | — | 19 | ~1921 |
| Alexander Keefe | Son | — | 16 | ~1924 |
| Florence Keefe | Daughter | — | 23 | ~1917 |
| Norene Keefe | Daughter | — | 22 | ~1918 |
| Fursey Keefe | Head | — | 60 | ~1880 |
| Jane Keefe | Spouse | — | 51 | ~1889 |
| Jessie Keefe | Daughter | — | 25 | ~1915 |
Census Appearances
1930
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1919 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Keefe |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Canada |
| Age at First Marriage | 1902 |
| Father's Birthplace | Canada |
| Mother's Birthplace | Canada |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Canada |
| Birthplace (normalized) | canada |
1940
Cook-County, Illinois
Son, age 21
Cook-County, Illinois · implied b. ~1919 — 8 household members
| Surname | KEEFE |
| Given Name | JOHN |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Canada |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Clerk |
| Industry | Mail Order |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 450 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth Country | Canada |
| Birthplace (normalized) | canada |
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 Keefe across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Keefe
Son · 1940 · age 21 · b. ~1919 · Illinois
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Sibling
Margaret Keefe
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Norene Keefe
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jessie Keefe
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Keefe
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alexander Keefe
Sibling · 1940 · age 16
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
37 people indexed on this census page (nara:1940:m-t0627-01014-00787)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Wilson Johnston | 51 | Head | Maintenance Man | Eire |
| 42 | Frances R. Johnston | 64 | Wife | — | Eire |
| 43 | Emmy Chinlund | 46 | Head | — | Illinois |
| 44 | Joseph H. Chinlund | 20 | Son | — | Illinois |
| 46 | John Smits | 30 | Head | Carpenter | Holland |
| 47 | Martha Smits | 33 | Wife | — | Germany |
| 48 | Henry Smits | 5 | Son | — | Illinois |
| 49 | Arlene Smits | 1 | Daughter | — | Illinois |
| 50 | Helen Koelsch | 57 | Head | — | Illinois |
| 51 | Louise Koelsch | 20 | Daughter | Comptometer Oper | Illinois |
| 52 | William Millinghausen | 46 | Head | Layout Man | Germany |
| 53 | Frances Millinghausen | 47 | Wife | Cook | Germany |
| 54 | Nick Dispenza | 37 | Head | Cab Driver | Tunis |
| 55 | Jennie Dispenza | 38 | Wife | — | Illinois |
| 56 | Peter Dispenza | 10 | Son | — | Illinois |
| 57 | Grace Dispenza | 8 | Daughter | — | Illinois |
| 58 | Chester Lindahl | 32 | Head | Mail Carrier | Missouri |
| 59 | Ruth Lindahl | 30 | Wife | — | Tennessee |
| 60 | Audrey Lindahl | 7 | Daughter | — | Illinois |
| 61 | Shirley Lindahl | 5 | Daughter | — | Illinois |
| 62 | Lillian Svendsen | 31 | Head | Factory Girl | Illinois |
| 63 | Martha Michaels | 24 | Sister | Factory Girl | Illinois |
| 64 | Ambrose Sadowski | 22 | Brother | Clerk | Illinois |
| 66 | Henry Versgrove | 51 | Head | Policeman | Belgium |
| 67 | Catherine Versgrove | 56 | Wife | — | Missouri |
| 68 | Catherine Versgrove | 22 | Daughter | Registered Nurse | Illinois |
| 69 | Henry Jr. Versgrove | 20 | Son | Page | Illinois |
| 70 | Nancy Versgrove | 18 | Daughter | Laborer | Illinois |
| 71 | Helen Versgrove | 15 | Daughter | — | Illinois |
| 72 | Fursey Keefe | 60 | Head | Cabinet Maker | England |
| 73 | Jane Keefe | 51 | Wife | — | England |
| 74 | Jessie Keefe | 25 | Daughter | Assistant Manager | Canada |
| 75 | Florence Keefe | 23 | Daughter | Switchboard Operator | Canada |
| 76 | Norene Keefe | 22 | Daughter | Saleslady | Canada |
| 77 | John Keefe THIS PERSON | 21 | Son | Clerk | Canada |
| 78 | Margaret Keefe | 19 | Daughter | Telephone Oper | Canada |
| 79 | Alexander Keefe | 16 | Son | — | Massachusetts |
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)