JC
John Cunningham — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Cunningham across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Michael & James — first a head (b.~1904), then head of a 3-person household.
Age 36
b. ~1904
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Cunningham |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Policeman |
| Industry | City Dept. |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2370 |
| Highest Grade | H-3 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Policeman |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1904 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Cunningham | Head | — | 36 | ~1904 |
| Donald Cunningham | Son | — | 1 | ~1939 |
| Lucille Cunningham | Spouse | — | 31 | ~1909 |
Census Appearances
1920
Cook, Illinois
Son, age 16
Cook, Illinois · implied b. ~1904 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cunningham |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 27
Cook, Illinois · implied b. ~1903 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cunningham |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | City Police |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 36
Cook-County, Illinois · implied b. ~1904 — 3 household members
| Surname | Cunningham |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Policeman |
| Industry | City Dept. |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2370 |
| Highest Grade | H-3 |
| 1935 Residence | Same house |
| 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 Cunningham across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Michael Cunningham (~0.92 confidence) and father James Cunningham (~0.92 confidence) and mother Agnes Cunningham (~0.92 confidence) and mother Mary Cunningham (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Cunningham
b. ~1868
Source father
● Household
· direct · ~0.92
Father
James Cunningham
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Agnes Cunningham
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Mary Cunningham
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Cunningham
Head · 1940 · age 36 · b. ~1904 · Illinois
★ You are viewing this record
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-t0627-00936-00155)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Shirley J. Clancy | 16 | Daughter | Page Girl | Illinois |
| 42 | Raymond W. Clancy | 14 | Son | — | Illinois |
| 43 | Willard C. Ceta | 39 | Head | Salesman | New York |
| 44 | Genevieve Ceta | 36 | Wife | — | Ohio |
| 45 | John T. Ceta | 4 | Son | — | Illinois |
| 46 | Nann Clerke | 63 | Mother-in-law | — | Pennsylvania |
| 47 | George Martrick | 42 | Head | Detective | Illinois |
| 48 | Marie Martrick | 41 | Wife | — | Michigan |
| 49 | Lois Martrick | 18 | Daughter | — | Michigan |
| 50 | Herbert J. Maurer | 31 | Head | Audit Man | Illinois |
| 51 | Frances Maurer | 31 | Wife | Clerical | Illinois |
| 52 | John Cunningham THIS PERSON | 36 | Head | Policeman | Illinois |
| 53 | Lucille Cunningham | 31 | Wife | — | Illinois |
| 54 | Donald Cunningham | 1 | Son | — | Illinois |
| 55 | William Meyers | 55 | Head | Bridge Operator | Illinois |
| 56 | Anna Meyers | 56 | Wife | — | Illinois |
| 57 | Betty Ann Meyers | 13 | Daughter | — | Illinois |
| 58 | Wilfred A. Kearns | 57 | Head | Supervising Clerk | Illinois |
| 59 | Clara C. Kearns | 48 | Wife | — | Illinois |
| 60 | Wilfred G. Kearns | 19 | Son | New Worker | Illinois |
| 61 | Phillip Kearns | 17 | Son | — | Illinois |
| 62 | Alice Kearns | 9 | Daughter | — | Illinois |
| 63 | Walter Black | 41 | Head | Crane Operator | Pennsylvania |
| 64 | Nell Black | 41 | Wife | — | Scotland |
| 65 | Carl Johnson | 40 | Head | Clerk | Sweden |
| 66 | Frances Johnson | 37 | Wife | — | Illinois |
| 67 | Richard Johnson | 13 | Son | — | Illinois |
| 68 | William Johnson | 9 | Son | — | Illinois |
| 69 | Hugh Morton | 47 | Head | Motor Inspector | Scotland |
| 70 | Lillian M. Morton | 41 | Wife | — | Scotland |
| 71 | Lillian M. Morton | 15 | Daughter | — | Indiana |
| 72 | Hugh J. Morton | 13 | Son | — | Illinois |
| 73 | Lillian Wilder | 54 | Head | — | Norway |
| 74 | Mary Elizabeth Wilder | 24 | Daughter | Teacher | Minnesota |
| 75 | Robert Wilder | 14 | Son | Delivery Boy | Illinois |
| 76 | John Wilder | 18 | Son | — | Illinois |
| 77 | John Frazier | 39 | Head | Switchboard Operator | Iowa |
| 78 | Lorraine Frazier | 29 | Wife | — | Illinois |
| 79 | Joan Frazier | 7 | Daughter | — | Illinois |
Pedigree Summary
John
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)