JL
Joseph Leonard — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Joseph Leonard across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 4-person household.
Age 63
b. ~1877
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | LEONARD |
| Given Name | JOSEPH |
| Relationship to Head | HEAD |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Philadelphia City |
| 1935 Residence (County) | Philadelphia |
| Naturalization Status | Alien |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1877 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| James Leonard | Son | — | 28 | ~1912 |
| Marie Leonard | Daughter | — | 24 | ~1916 |
| Mary Leonard | Spouse | — | 51 | ~1889 |
| Joseph Leonard | Head | — | 63 | ~1877 |
Census Appearances
1920
Philadelphia, Pennsylvania
Head, age 38
Philadelphia, Pennsylvania · implied b. ~1882 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1903 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Handy Man |
| Industry | Oil works |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Philadelphia, Pennsylvania
Head, age 51
Philadelphia, Pennsylvania · implied b. ~1879 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1903 |
| Age at First Marriage | 32 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Steam Fitter |
| Industry | Rail Road |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Philadelphia-County, Pennsylvania
Head, age 63
Philadelphia-County, Pennsylvania · implied b. ~1877 — 4 household members
| Surname | LEONARD |
| Given Name | JOSEPH |
| Relationship to Head | HEAD |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Philadelphia City |
| 1935 Residence (County) | Philadelphia |
| Naturalization Status | Alien |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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.
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This person
Anchor record
Joseph Leonard
Head · 1940 · age 63 · b. ~1877 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03737-00343)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Jr O'Malley | 21 | SON | Drill Press Operator | Penna |
| 42 | Emmons C. Starks | 28 | HEAD | Machinist Helper | NEW YORK |
| 43 | Marion E. Starks | 25 | WIFE | — | Penna |
| 44 | Joan Starks | 3 | DAUGHTER | — | Penna |
| 45 | Elizabeth Lifter | 46 | HEAD | Maid | Ireland |
| 46 | Elva A. Burns | 37 | HEAD | — | Penna |
| 47 | Eileen Burns | 18 | WIFE | Sales Girl | Penna |
| 48 | John Burns | 16 | SON | — | Penna |
| 49 | Margaret Burns | 14 | DAUGHTER | — | Penna |
| 50 | Doris Burns | 11 | DAUGHTER | — | Penna |
| 51 | Robert J. Burns | 8 | SON | — | Penna |
| 52 | Joseph A. Brennan | 50 | HEAD | Plumber | Penna |
| 53 | Thomas F. Brennan | 47 | BROTHER | Machinist | Penna |
| 54 | Helen Brennan | 53 | SISTER | General Clerk | Penna |
| 55 | Mary Ryan | 59 | HALF-SISTER | — | Penna |
| 56 | Margaret Ryan | 57 | HALF-SISTER | Drawing Machine Operator | Penna |
| 57 | Mitchel J. Boggs | 32 | HEAD | Carpenter | Penna |
| 58 | Ruth E. Boggs | 30 | WIFE | — | Penna |
| 59 | Mitchel J. Jr Boggs | 11 | SON | — | Penna |
| 60 | Elizabeth R Boggs | 9 | DAUGHTER | — | Penna |
| 61 | James M. Boggs | 7 | SON | — | Penna |
| 62 | Alice M. Boggs | 3 | DAUGHTER | — | Penna |
| 63 | John J. Friel | 34 | HEAD | Truck-Driver | Penna |
| 64 | Mary Friel | 29 | WIFE | Power-Operator | Penna |
| 65 | John J. Jr. Friel | 9 | SON | — | Penna |
| 66 | Donald Friel | 6 | SON | — | Penna |
| 67 | Helen Kelly | 24 | STEP-SISTER | Housemaid | Penna |
| 68 | Joseph Leonard THIS PERSON | 63 | HEAD | — | Ireland |
| 69 | Mary Leonard | 51 | WIFE | — | Ireland |
| 70 | James Leonard | 28 | SON | Shell Casing Maker | Penna |
| 71 | Marie Leonard | 24 | DAUGHTER | — | Penna |
| 72 | Mary E. Carrick | 50 | HEAD | — | Ireland |
| 73 | Margaret A. Carrick | 21 | DAUGHTER | House-Maid | Penna |
| 74 | Catharine E. Carrick | 19 | DAUGHTER | New Worker | Penna |
| 75 | Mary T. Carrick | 4 | DAUGHTER | — | Penna |
| 76 | Charles G. Hefferan | 23 | HEAD | Cooper | Penna |
| 77 | Catharine A. Hefferan | 25 | WIFE | — | Penna |
| 78 | Charles Cassidy | 52 | HEAD | Painter | Ireland |
| 79 | Cecelia Cassidy | 51 | WIFE | — | Ireland |
| 80 | Agnes Cassidy | 22 | DAUGHTER | Hair-Dresser | Ireland |
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)