ML
Mary Leach — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Mary Leach across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 5-person household.
Age 52
b. ~1888
Female
Spouse
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Leach |
| Given Name | Mary G |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Phila |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
| Est. Birth Year | ~1888 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Joan Leach | Daughter | — | 18 | ~1922 |
| Ronald Leach | Son | — | 14 | ~1926 |
| Herbert Leach | Son | — | 25 | ~1915 |
| James Leach | Head | — | 51 | ~1889 |
| Mary Leach | Spouse | — | 52 | ~1888 |
Census Appearances
1930
Philadelphia, Pennsylvania
Spouse, age 44
Philadelphia, Pennsylvania · implied b. ~1886 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leach |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1923 |
| Age at First Marriage | 25 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Veteran | No |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Philadelphia-County, Pennsylvania
Spouse, age 52
Philadelphia-County, Pennsylvania · implied b. ~1888 — 5 household members
| Surname | Leach |
| Given Name | Mary G |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Phila |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Mary Leach across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Leach
Spouse · 1940 · age 52 · b. ~1888 · 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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-03702-00227)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Eleanor H Nulty | 50 | Head | Organist | Penna |
| 42 | James H Nulty | 39 | Brother | Clerk | Penna |
| 43 | Clara S Nulty | 31 | Sister | — | Maryland |
| 44 | James J. Jr Nulty | 7 | Son | — | Penna |
| 45 | John Loden | 30 | Head | Clerk | Penna |
| 46 | Ruth Loden | 30 | Wife | — | Penna |
| 47 | John Loden | 3 | Son | — | Penna |
| 48 | James Leach | 51 | Head | Tool Maker | England |
| 49 | Mary G Leach THIS PERSON | 52 | Wife | — | England |
| 50 | Herbert Leach | 25 | Son | Operator | England |
| 51 | Joan Leach | 18 | Daughter | Typist | England |
| 52 | Ronald Leach | 14 | Son | — | Penna |
| 54 | Edward Bontonville | 49 | Head | Carpenter | Penna |
| 55 | Ethel Bontonville | 43 | Wife | — | Penna |
| 56 | George Bontonville | 14 | Son | — | Penna |
| 57 | Frank Bontonville | 8 | Son | — | Penna |
| 58 | Robert Bontonville | 6 | Son | — | Penna |
| 59 | Clara O'Connell | 22 | Daughter | — | Penna |
| 60 | Clare V O'Connell | 1 | Granddaughter | — | Penna |
| 61 | Edward Lukes | 35 | Head | Milkman | Penna |
| 62 | Catherine Lukes | 34 | Wife | — | Penna |
| 63 | Edward Lukes | 1 | Son | — | Penna |
| 64 | George Brown | 45 | Head | Upholstery | N. Jersey |
| 65 | Blanche Brown | 41 | Wife | — | Penna |
| 66 | Victor Brown | 10 | Son | — | Penna |
| 67 | Bruce Brown | 3 | Son | — | Penna |
| 68 | Josephine Hansher | 50 | Head | — | Penna |
| 69 | Dorothy Hansher | 40 | Daughter | — | Penna |
| 70 | Helen Mccready | 35 | Head | — | New Jersey |
| 71 | Frances Mccready | 18 | Son | — | Penna |
| 72 | Vincent Springer | 35 | Head | Machinist | N. Jersey |
| 73 | Edna Springer | 35 | Wife | — | Penna |
| 74 | Richard Springer | 3 | Son | — | Penna |
| 75 | Barbara Springer | 2 | Daughter | — | Penna |
| 76 | William Hoffard | 52 | Head | Teacher | Penna |
| 77 | Pearl Hoffard | 41 | Wife | — | Penna |
| 78 | Jean Hoffard | 18 | Daughter | — | Penna |
| 79 | Scott Hoffard | 14 | Son | Attendant | Penna |
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)