JL
Joseph Leonard — 1940 US Census Record
Model Tree available1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Joseph Leonard across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents James & Annie — first a head (b.~1905), then head of a 5-person household.
Age 35
b. ~1905
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Leonard |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Chester City |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | Owner |
| Industry | Auto Tire Business |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Owner |
| Township / Ward | Chester City |
| Est. Birth Year | ~1905 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Rose Leonard | Spouse | — | 36 | ~1904 |
| Joseph Leonard | Head | — | 35 | ~1905 |
| Eugene Leonard | Son | — | 8 | ~1932 |
| Joseph Leonard | Son | — | 11 | ~1929 |
| James Leonard | Other | — | 65 | ~1875 |
Census Appearances
1920
Delaware, Pennsylvania
Son, age 14
Delaware, Pennsylvania · implied b. ~1906 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Messenger |
| Industry | Automobile Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Delaware, Pennsylvania
Son, age 24
Delaware, Pennsylvania · implied b. ~1906 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 20 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Mechanic |
| Industry | Ford Motor |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Head, age 35
Delaware-County, Pennsylvania · implied b. ~1905 — 5 household members
| Surname | Leonard |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Chester City |
| 1935 Residence (County) | Delaware |
| Occupation | Owner |
| Industry | Auto Tire Business |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 James Leonard (~0.92 confidence) and mother Annie Leonard (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Leonard
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Annie Leonard
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Leonard
Head · 1940 · age 35 · b. ~1905 · Pennsylvania
★ 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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03487-00243)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mildred Innis | 14 | Daughter | No | Pennsylvania |
| 2 | J. Chester Taylor | 38 | Head | Clerk | Pennsylvania |
| 3 | Edith E. Taylor | 31 | Wife | No | Delaware |
| 4 | Richard W. Taylor | 7 | Son | — | Delaware |
| 5 | Marjorie A. Taylor | 6 | Daughter | — | Delaware |
| 6 | Thomas E. Gough | 51 | Head | Clerk | Pennsylvania |
| 7 | Alfreda M. Gough | 49 | Wife | No | Pennsylvania |
| 8 | Thomas E. Gough | 25 | Son | Machinist Helper | Pennsylvania |
| 9 | John W. Parker | 46 | Head | Superintendent Construction | Pennsylvania |
| 10 | Lillian W. Parker | 48 | Wife | No | Delaware |
| 11 | James H. Parker | 18 | Son | No | Pennsylvania |
| 12 | Ethel M. Parker | 15 | Daughter | No | Pennsylvania |
| 13 | John W. Parker | 14 | Son | No | Pennsylvania |
| 14 | Samuel W. Parker | 10 | Son | — | West Virginia |
| 15 | Arne Fortin | 36 | Head | Manager | New York |
| 16 | Elizabeth Fortin | 32 | Wife | No | Maryland |
| 17 | Janet Fortin | 9 | Daughter | — | Pennsylvania |
| 18 | Phyllis Fortin | 7 | Daughter | — | Pennsylvania |
| 19 | Warren R. Ferree | 42 | Head | Auditor | Pennsylvania |
| 20 | Olive Ferree | 37 | Wife | No | Pennsylvania |
| 21 | Warren Jr. Ferree | 13 | Son | No | Pennsylvania |
| 22 | Patricia Ferree | 7 | Daughter | — | Pennsylvania |
| 23 | William Ferree | 25 | Head | Proprietor | Pennsylvania |
| 24 | Elizabeth Ferree | 25 | Wife | No | Pennsylvania |
| 25 | Margaret Ferree | 38 | Sister | Teacher | Pennsylvania |
| 26 | Robert W. Tucker | 39 | Head | Professor | Illinois |
| 27 | Kathleen Tucker | 36 | Wife | No | North Carolina |
| 28 | Robert W. Jr. Tucker | 8 | Son | — | Pennsylvania |
| 29 | David A. Tucker | 3 | Son | — | Pennsylvania |
| 30 | Joseph Leonard THIS PERSON | 35 | Head | Owner | Pennsylvania |
| 31 | Rose Leonard | 36 | Wife | No | New York |
| 32 | Joseph Leonard | 11 | Son | — | Pennsylvania |
| 33 | Eugene Leonard | 8 | Son | — | Pennsylvania |
| 34 | James Father Leonard | 65 | Father | No | England |
| 35 | Herman Ferrell | 37 | Head | Manager | North Carolina |
| 36 | Lucille Ferrell | 28 | Wife | No | Virginia |
| 37 | Robert Volkhardt | 45 | Head | Bookkeeper | Pennsylvania |
| 38 | Viola Volkhardt | 42 | Wife | No | Pennsylvania |
| 39 | Bette Volkhardt | 18 | Daughter | No | Pennsylvania |
| 40 | Roland Cyr | 30 | Head | Manager | Maine |
Related Census Records
Pedigree Summary
Joseph
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)