JG
John Grimes — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Grimes across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Male
Son
Born: ILLINOIS
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | GRIMES |
| Given Name | JOHN |
| Relationship to Head | SON |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | ILLINOIS |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1926 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Hilma Grimes | Other | — | 52 | ~1888 |
| Herbert Schaeffer | Head | — | 45 | ~1895 |
| John Grimes | Son | — | 14 | ~1926 |
| Edward Grimes | Son | — | 27 | ~1913 |
| Harold Grimes | Son | — | 21 | ~1919 |
| Jean Grimes | Other | — | 23 | ~1917 |
| Mabel Schaeffer | Spouse | — | 46 | ~1894 |
Census Appearances
1930
Cook, Illinois
Son, age 4
Cook, Illinois · implied b. ~1926 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grimm |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 14
Cook-County, Illinois · implied b. ~1926 — 7 household members
| Surname | GRIMES |
| Given Name | JOHN |
| Relationship to Head | SON |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | ILLINOIS |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Highest Grade | 6 |
| 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 Grimes across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Grimes
Son · 1940 · age 14 · b. ~1926 · Illinois
★ You are viewing this record
Sibling
Edward Grimes
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Grimes
Sibling · 1940 · age 21
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-t0627-00990-00232)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Matilda Cohen | 14 | DAUGHTER | — | ILLINOIS |
| 2 | Charles Sachs | 71 | HEAD | Salesmen | ILLINOIS |
| 3 | Max Sachs | 37 | BROTHER | Salesman | ILLINOIS |
| 4 | Frank Rooney | 28 | HEAD | Salesman | ILLINOIS |
| 5 | Rita Rooney | 28 | WIFE | — | ILLINOIS |
| 6 | John P. Rooney | 9 | SON | — | ILLINOIS |
| 7 | Patricia Ann Rooney | 8 | DAUGHTER | — | ILLINOIS |
| 8 | James M. Rooney | 5 | SON | — | ILLINOIS |
| 9 | Thomas V. Rooney | 1 | SON | — | ILLINOIS |
| 10 | Frank L. Porter | 52 | LODGER | Senior Clerk | ILLINOIS |
| 11 | James Milligan | 33 | HEAD | Plasterer | ILLINOIS |
| 12 | Annatean Milligan | 32 | WIFE | — | PENNSYLVANIA |
| 13 | Spencer Milligan | 2 | SON | — | ILLINOIS |
| 14 | Hans Kollner | 55 | HEAD | Carpenter | DENMARK |
| 15 | Jacobina Kollner | 55 | WIFE | — | DENMARK |
| 16 | Edna Kollner | 30 | DAUGHTER | Stenographer | ILLINOIS |
| 17 | Walter Kollner | 25 | SON | Coil Winder | ILLINOIS |
| 18 | Dorothy Kollner | 21 | DAUGHTER | Stenographer | ILLINOIS |
| 19 | Swan Swanson | 51 | HEAD | Laborer | SWEDEN |
| 20 | Frieda Swanson | 50 | WIFE | — | SWEDEN |
| 21 | Swan O. Jr. Swanson | 29 | SON | Bookkeeper | SWEDEN |
| 22 | Warren Swanson | 14 | SON | — | ILLINOIS |
| 23 | Joyce Swanson | 12 | DAUGHTER | — | ILLINOIS |
| 24 | Kenneth Maguire | 32 | HEAD | Truck Driver | ILLINOIS |
| 25 | Emily Maguire | 42 | WIFE | — | ILLINOIS |
| 26 | Andrew Anderson | 36 | HEAD | Structural Iron Worker | NORWAY |
| 27 | Celia Anderson | 41 | WIFE | — | MINNESOTA |
| 28 | Herbert Schaeffer | 45 | HEAD | Diesel Eng. Mechanic | NORWAY |
| 29 | Mabel Schaeffer | 46 | WIFE | — | ILLINOIS |
| 30 | Hilma Grimes | 52 | MOTHER | — | ILLINOIS |
| 31 | Harold Grimes | 21 | SON | Sales Clerk | ILLINOIS |
| 32 | John Grimes THIS PERSON | 14 | SON | — | ILLINOIS |
| 33 | Edward Grimes | 27 | SON | Lister | ILLINOIS |
| 34 | Jean Grimes | 23 | DAUGHTER-IN-LAW | — | ILLINOIS |
| 35 | Thomas Osterhus | 32 | HEAD | Draftsman Mechanical | NORWAY |
| 36 | Edith Osterhus | 34 | WIFE | — | NORWAY |
| 37 | Adolph Knutson | 36 | HEAD | Furnace Builder | SWEDEN |
| 38 | Ida Knutson | 37 | WIFE | — | SWEDEN |
| 39 | Bob Kuze | 25 | ROOMER | Salesman | MICHIGAN |
| 40 | Cancelled Cancelled | None | CANCELLED | Cancelled | CANCELLED |
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)