JG
John Gardner — 1940 US Census Record
Model Tree available1940 United States Federal Census · Adams-County, Illinois
Our Model Tree links this John Gardner across the 1920, 1930 and 1940 US Censuses in Adams-County, Illinois (XGBoost, ~Confirmed), with identified parents Rebecca & Ralph — first a son (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Adams-County, Illinois |
| Surname | Gardner |
| Given Name | John (at) |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Quincy city |
| 1935 Residence (County) | Adams |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Quincy City |
| Est. Birth Year | ~1918 |
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 |
|---|---|---|---|---|
| Patricia Gardner | Daughter | — | 15 | ~1925 |
| Ralph Gardner | Head | — | 50 | ~1890 |
| Mary Mccrone | Other | — | 68 | ~1872 |
| Joseph Gardner | Son | — | 21 | ~1919 |
| John Gardner | Son | — | 22 | ~1918 |
| Rebecca Gardner | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Adams, Illinois
Son, age 2
Adams, Illinois · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gardner |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Adams, Illinois
Son, age 12
Adams, Illinois · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gardner |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Adams-County, Illinois
Son, age 22
Adams-County, Illinois · implied b. ~1918 — 6 household members
| Surname | Gardner |
| Given Name | John (at) |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Quincy city |
| 1935 Residence (County) | Adams |
| Income (1939) | 0 |
| Highest Grade | C 3 |
| 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 Gardner across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Rebecca Gardner (~0.92 confidence) and father Ralph Gardner (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Rebecca Gardner
b. ~1888
Source mother
● Household
· direct · ~0.92
Father
Ralph Gardner
b. ~1890
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Gardner
Son · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Joseph Gardner
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Gardner
Sibling · 1940 · age 15
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 — Adams-County, Illinois
Open full size
1940 US Federal Census — Adams-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00757-00582)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rose B. Lightly | 80 | Head | — | Illinois |
| 2 | Sara Conrad | 50 | Lodger | — | Illinois |
| 3 | Ralph Gardner | 50 | Head | Treasurer | Illinois |
| 4 | Rebecca R. Gardner | 52 | Wife | — | Illinois |
| 5 | John (At) Gardner THIS PERSON | 22 | Son | — | Illinois |
| 6 | Joseph (At) Gardner | 21 | Son | — | Illinois |
| 7 | Patricia Gardner | 15 | Daughter | — | Illinois |
| 8 | Mary Mccrone | 68 | Maid | Housekeeper | Missouri |
| 9 | Robert Kinneman | 49 | Head | Manager | Indiana |
| 10 | Iona Kinneman | 46 | Wife | — | Indiana |
| 11 | Syrena Kinneman | 11 | Daughter | — | Indiana |
| 12 | Ida Piner | 26 | Maid | House Keeper | Illinois |
| 13 | Madeline Ostman | 22 | Maid | House Keeper | Illinois |
| 14 | Eda Huch | 74 | Head | — | Illinois |
| 15 | Richard Huch | 35 | Son | Treasurer | Illinois |
| 16 | Richard Jr. Huch | 16 | Grandson | — | Illinois |
| 17 | Margurite Huch | 45 | Daughter | Secretary | Illinois |
| 18 | Millie Burge | 70 | Sister | — | Illinois |
| 19 | Minerva Howard | 24 | Maid | Housekeeper | Missouri |
| 20 | Charles Heidbreder | 60 | Head | Bookkeeper | Illinois |
| 21 | Caroline Heidbreder | 57 | Wife | — | Illinois |
| 22 | Charles Jr. Heidbreder | 32 | Son | Attendant | Illinois |
| 23 | Harold Heidbreder | 16 | Son | — | Illinois |
| 24 | Ettavene Sigemon | 26 | Head | Stenographer | Missouri |
| 25 | Garnelle Sigemon | 24 | Sister | — | Missouri |
| 26 | Henry Ippensen | 61 | Head | — | Illinois |
| 27 | Maude Ippensen | 57 | Wife | — | Illinois |
| 28 | Elum Martin | 29 | Lodger | Driver | Illinois |
| 29 | Margurite Martin | 31 | Wife | — | Illinois |
| 30 | Frank Wiershem | 26 | Lodger | Driver | Illinois |
| 31 | Rena Mctucker | 73 | Head | — | Illinois |
| 32 | Lois Mctucker | 47 | Daughter | Nurse | Illinois |
| 33 | Paul Hillman | 36 | Head | Manager | Illinois |
| 34 | Lucy Hillman | 35 | Wife | — | Illinois |
| 35 | John Beaty | 65 | Lodger | — | New York |
| 36 | Ina Beaty | 67 | Mother | — | Illinois |
| 37 | John Mcclain | 22 | Lodger | Bartender | Montana |
| 38 | Joseph De Salvo | 32 | Lodger | Laborer | Illinois |
| 39 | Joseph Ehast | 53 | Head | Manager | Iowa |
| 40 | Melbina Ehast | 53 | Wife | — | Illinois |
Pedigree Summary
John + 2 siblings
Gen 1 · 2 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)