JL
Joseph Leonard — 1940 US Census Record
Model Tree available1940 United States Federal Census · Madison-County, Illinois
Our Model Tree links this Joseph Leonard across the 1920, 1930 and 1940 US Censuses in Madison-County, Illinois (XGBoost, ~Confirmed), with identified parents Joseph & Wilhelmina — first a son (b.~1914), then head of a 9-person household.
Age 26
b. ~1914
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Madison-County, Illinois |
| Surname | Leonard |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Alton city |
| 1935 Residence (County) | Madison |
| Additional Details | |
| Occupation | Back tender |
| Industry | Box board |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 11 |
| Highest Grade | S |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Back Tender |
| Township / Ward | Alton City |
| Est. Birth Year | ~1914 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Wilhelmina Leonard | Daughter | — | 24 | ~1916 |
| Harold Leonard | Son | — | 17 | ~1923 |
| Henry Binkman | Other | — | 86 | ~1854 |
| Henry Leonard | Son | — | 21 | ~1919 |
| Joseph Leonard | Son | — | 26 | ~1914 |
| Wilhelmina Leonard | Spouse | — | 54 | ~1886 |
| Anna Leonard | Daughter | — | 22 | ~1918 |
| Joseph Leonard | Head | — | 54 | ~1886 |
| Lucille Leonard | Daughter | — | 30 | ~1910 |
Census Appearances
1920
Madison, Illinois
Son, age 7
Madison, Illinois · implied b. ~1913 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Joseph E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Madison, Illinois
Son, age 18
Madison, Illinois · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Joseph F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Madison-County, Illinois
Son, age 26
Madison-County, Illinois · implied b. ~1914 — 9 household members
| Surname | Leonard |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Alton city |
| 1935 Residence (County) | Madison |
| Occupation | Back tender |
| Industry | Box board |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 11 |
| Highest Grade | S |
| 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 Joseph Leonard across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Leonard (~0.92 confidence) and mother Wilhelmina Leonard (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Leonard
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Wilhelmina Leonard
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Leonard
Son · 1940 · age 26 · b. ~1914 · Illinois
★ You are viewing this record
Sibling
Harold Leonard
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wilhelmina Leonard
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucille Leonard
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Leonard
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Leonard
Sibling · 1940 · age 22
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 — Madison-County, Illinois
Open full size
1940 US Federal Census — Madison-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00848-00916)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward Varady | 2 | Grand son | — | Illinois |
| 2 | Adeline Weiss | 52 | Head | Repacker | Illinois |
| 3 | Elenor Weiss | 28 | Daughter | — | Illinois |
| 4 | Eugene Weiss | 28 | Son | — | Illinois |
| 5 | Allen Weiss | 21 | Son | Clerk | Illinois |
| 6 | Kate Bean | 80 | Mother | — | England |
| 7 | Earl Bean | 53 | Brother | — | Illinois |
| 8 | Raymond Nash | 52 | Head | Salesman | Illinois |
| 9 | Sylvia Nash | 44 | Wife | — | Kansas |
| 11 | John Baker | 37 | Head | Service Station Attendant | Illinois |
| 12 | Calista Baker | 34 | Wife | — | Illinois |
| 13 | Warren Baker | 16 | Son | Pin Boy | Missouri |
| 14 | Laverna Baker | 14 | Daughter | — | Illinois |
| 15 | Helen Baker | 12 | Daughter | — | Illinois |
| 16 | Geraldine Baker | 11 | Daughter | — | Illinois |
| 17 | Joseph Ressler | 26 | Head | Mill Hand | Illinois |
| 18 | Helen Ressler | 29 | Wife | — | Colorado |
| 19 | Raymond Treece | 29 | Head | Machinist | Illinois |
| 20 | Verda Treece | 27 | Wife | — | Illinois |
| 21 | Donald Treece | 7 | Son | — | Illinois |
| 22 | Ola Robertson | 31 | Head | — | Illinois |
| 23 | Anna Mae Robertson | 8 | Daughter | — | Illinois |
| 24 | Hewitt Robertson | 6 | Son | — | Illinois |
| 25 | Leonard Robertson | 3 | Son | — | Illinois |
| 26 | Bettie Payster | 14 | Daughter | — | Illinois |
| 27 | Amie Payster | 12 | Daughter | — | Illinois |
| 28 | Joseph Leonard | 54 | Head | Manager | Illinois |
| 29 | Wilhelmina Leonard | 54 | Wife | — | Germany |
| 30 | Lucille Leonard | 30 | Daughter | — | Illinois |
| 31 | Joseph Leonard THIS PERSON | 26 | Son | Back Tender | Illinois |
| 32 | Wilhelmina Leonard | 24 | Daughter | — | Illinois |
| 33 | Anna Leonard | 22 | Daughter | — | Illinois |
| 34 | Henry Leonard | 21 | Son | Winder | Illinois |
| 35 | Harold Leonard | 17 | Son | — | Illinois |
| 36 | Henry Binkman | 86 | Father in law | — | Germany |
| 37 | Curtis Brown | 42 | Head | Clerk | Illinois |
| 38 | Harriet Brown | 41 | Wife | — | Illinois |
| 39 | Anita Brown | 14 | Daughter | — | Illinois |
| 40 | Eileen Brown | 12 | Daughter | — | Illinois |
Related Census Records
Pedigree Summary
Joseph + 5 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)