JF
John French — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Illinois
Our Model Tree links this John French across the 1930 and 1940 US Censuses in Lake-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 6-person household.
Age 20
b. ~1920
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Illinois |
| Surname | French |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Occupation | Service Station Attendant |
| Industry | Service Station |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 20 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Service Station Attendant |
| Township / Ward | Waukegan City |
| Est. Birth Year | ~1920 |
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 |
|---|---|---|---|---|
| Emily French | Daughter | — | 14 | ~1926 |
| Lois French | Daughter | — | 23 | ~1917 |
| Harry French | Head | — | 48 | ~1892 |
| Louis French | Son | — | 18 | ~1922 |
| John French | Son | — | 20 | ~1920 |
| Nellie French | Spouse | — | 49 | ~1891 |
Census Appearances
1930
Lake, Illinois
Son, age 10
Lake, Illinois · implied b. ~1920 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | French |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Lake-County, Illinois
Son, age 20
Lake-County, Illinois · implied b. ~1920 — 6 household members
| Surname | French |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Occupation | Service Station Attendant |
| Industry | Service Station |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 20 |
| Highest Grade | Hs 4 |
| 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 French across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John French
Son · 1940 · age 20 · b. ~1920 · Illinois
★ You are viewing this record
Sibling
Emily French
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lois French
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louis French
Sibling · 1940 · age 18
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 — Lake-County, Illinois
Open full size
1940 US Federal Census — Lake-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00831-00328)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elbie Edward Phillips | 28 | Head | Laborer | Missouri |
| 42 | Marcella Phillips | 26 | Wife | — | Missouri |
| 43 | Franklin James | 71 | Head | — | Massachusetts |
| 44 | Jane E. James | 65 | Wife | — | Illinois |
| 45 | Laurence James | 36 | Son | — | New York |
| 46 | Nola Lillian A. James | 64 | Lodger | Practical Nurse | Missouri |
| 47 | Vinyan J. Rankin | 63 | Head | Janitor | England |
| 48 | Lucy Rankin | 58 | Sister | Winding | Illinois |
| 49 | Jessie E. Rankin | 52 | Sister | Bookkeeper | Illinois |
| 50 | Harry French | 48 | Head | Electrician | Iowa |
| 51 | Nellie French | 49 | Wife | — | Illinois |
| 52 | Lois French | 23 | Daughter | General Office Clerk | Illinois |
| 53 | John French THIS PERSON | 20 | Son | Service Station Attendant | Illinois |
| 54 | Louis French | 18 | Son | — | Illinois |
| 55 | Emily French | 14 | Daughter | — | Illinois |
| 56 | Carl Spitzfaden | 43 | Head | Salesman | Indiana |
| 57 | Pearl Spitzfaden | 46 | Wife | Clerk | Illinois |
| 58 | Alice Gunny | 76 | Head | — | Vermont |
| 59 | Josefa Aguila | 24 | Lodger | Business Correspondent | Guatemala |
| 60 | Alfonso Aguila | 30 | Lodger | Office Clerk | Mexico |
| 61 | Rudolfo Alonso | 39 | Lodger | Laborer | Mexico |
| 62 | Stanley Jr. Bishop | 30 | Head | Superintendent | Illinois |
| 63 | Alice Bishop | 23 | Wife | Battery Cover Inspector | Illinois |
| 64 | Peter Kirchner | 75 | Lodger | Fisherman | Illinois |
| 65 | Joseph Daly | 50 | Head | Postmaster | New York |
| 66 | Cecelia Demers | 52 | Housekeeper | Housekeeper | Michigan |
| 67 | Richard Lee Berthel | 34 | Head | Attendant | Illinois |
| 68 | Gertrude M. Berthel | 33 | Wife | Medical Secretary | Illinois |
| 69 | Charles Snoddy | 38 | Head | Chief Water Tender | Michigan |
| 70 | Virginia Snoddy | 41 | Wife | — | California |
| 71 | Emma Keen | 58 | Lodger | Pantry Cook | Wisconsin |
| 72 | Mabel Crawford | 52 | Lodger | Housekeeper | Canada |
| 73 | Eva Laux | 54 | Head | — | Illinois |
| 74 | June Laux | 25 | Daughter | Stenographer | Illinois |
| 75 | Carl H. Morey | 55 | Head | Clerk | Illinois |
| 76 | Hattie Catherine Morey | 55 | Wife | Dipper | Poland |
| 77 | Albertina Meyer | 68 | Head | — | Germany |
| 78 | Frank Gilbert | 42 | Head | Chief Storekeeper | Ohio |
| 79 | Germaine Gilbert | 40 | Wife | Cook | Canada-Fr. |
| 80 | Walton Smith | 26 | Head | Welder | Colorado |
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)