JL
John Leach — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Hampden, Massachusetts
Our Model Tree links this John Leach across the 1930 and 1940 US Censuses in Hampden, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1914), then head of a 5-person household.
Age 16
b. ~1914
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Hampden, Massachusetts |
| Surname | Leach |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Additional Details | |
| Occupation | Helper |
| Industry | Private Family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Helper |
| Township / Ward | Holyoke 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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Leach | Son | — | 16 | ~1914 |
| Anna Leach | Head | — | 44 | ~1886 |
| Clara Leach | Daughter | — | 18 | ~1912 |
| Helen Leach | Daughter | — | 9 | ~1921 |
| Jennie Leach | Daughter | — | 6 | ~1924 |
Census Appearances
1930
Hampden, Massachusetts
Son, age 16
Hampden, Massachusetts · implied b. ~1914 — 5 household members
| Surname | Leach |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | Helper |
| Industry | Private Family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Hampden-County, Massachusetts
Head, age 27
Hampden-County, Massachusetts · implied b. ~1913 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leece |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Mittonague |
| 1935 Residence (County) | Hampden |
| Occupation | Clerk |
| Industry | Fire insurance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Leach across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Leach
Son · 1930 · age 16 · b. ~1914 · Massachusetts
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Sibling
Clara Leach
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jennie Leach
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Leach
Sibling · 1930 · age 9
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
1930 US Federal Census — Hampden, Massachusetts
Open full size
1930 US Federal Census — Hampden, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel906:0618)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Jenny Byzek | 13 | Daughter | — | Massachusetts |
| 52 | Chester Byzek | 12 | Son | — | Massachusetts |
| 53 | Adella Byzek | 10 | Daughter | — | Massachusetts |
| 54 | Phillip Byzek | 8 | Son | — | Massachusetts |
| 55 | George Szczypek | 54 | Head | Helper | Poland |
| 56 | Mary Szczypek | 55 | Wife | — | Poland |
| 57 | Michael Szczypek | 26 | Son | Helper | Massachusetts |
| 58 | Raphael Szczypek | 15 | Son | Clerk | Massachusetts |
| 59 | Veronica Szczypek | 13 | Daughter | — | Massachusetts |
| 60 | Daniel Downey | 33 | Head | Cutter | Massachusetts |
| 61 | Mary Downey | 35 | Wife | — | Massachusetts |
| 62 | Edward Downey | 8 | Son | — | Massachusetts |
| 63 | Mary Downey | 6 | Daughter | — | Massachusetts |
| 64 | Daniel Downey | 5 | Son | — | Massachusetts |
| 65 | Thomas Downey | 3 | Son | — | Massachusetts |
| 66 | James Downey | 1 | Son | — | Massachusetts |
| 67 | Caroline Kibet | 37 | Head | Server | Poland |
| 68 | Edward Kibet | 15 | Son | — | Massachusetts |
| 69 | Lucille Kibet | 11 | Daughter | — | Massachusetts |
| 70 | Eugene Treaney | 42 | Head | Milkman | Massachusetts |
| 71 | Elizabeth Treaney | 31 | Wife | Weaver | Poland |
| 72 | Antony Sabin | 37 | Head | Helper | Poland |
| 73 | Staleya Sabin | 35 | Wife | — | Poland |
| 74 | Jennie Sabin | 11 | Daughter | — | Massachusetts |
| 75 | Joseph Sabin | 6 | Son | — | Massachusetts |
| 76 | Chester Sabin | 4 | Son | — | Massachusetts |
| 77 | John Phillips | 66 | Head | Yard Keeper | Ireland Free State |
| 78 | John Phillips | 26 | Son | Laborer | Massachusetts |
| 79 | James Pruitt | 50 | Head | Plumber | Massachusetts |
| 80 | Margaret Pruitt | 51 | Wife | — | Irish Free State |
| 81 | Anna Leach | 44 | Head | — | Poland |
| 82 | Clara Leach | 18 | Daughter | Helper | Massachusetts |
| 83 | John Leach THIS PERSON | 16 | Son | Helper | Massachusetts |
| 84 | Helen Leach | 9 | Daughter | — | Massachusetts |
| 85 | Jennie Leach | 6 | Daughter | — | Massachusetts |
| 86 | John Griffin | 31 | Head | Policeman | Massachusetts |
| 87 | Blanche Griffin | 31 | Wife | — | Massachusetts |
| 88 | Jerome Griffin | 9 | Son | — | Massachusetts |
| 89 | James Griffin | 5 | Son | — | Massachusetts |
| 90 | Thomas Griffin | 4 | Son | — | Massachusetts |
| 91 | Robert Griffin | 2 | Son | — | Massachusetts |
| 92 | John Jodoin | 33 | Head | Helper | Poland |
| 93 | Eleanor Jodoin | 32 | Wife | — | Poland |
| 94 | Edward Jodoin | 12 | Son | — | Massachusetts |
| 95 | Thaddeus Jodoin | 9 | Son | — | Massachusetts |
| 96 | Jennie Jodoin | 6 | Daughter | — | Massachusetts |
| 97 | Mary Cauley | 82 | Head | — | Irish Free State |
| 98 | Catherine Cauley | 54 | Daughter | Comber | Massachusetts |
| 99 | Anna Cauley | 45 | Daughter | Cutter Girl | Massachusetts |
| 100 | Thomas Cauley | 36 | Son | Clerk | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)