JS
John Slater — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Slater across the 1930 and 1940 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1911), then head of a 5-person household.
Age 19
b. ~1911
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Slater |
| Given Name | John J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | England |
| Additional Details | |
| Occupation | Laborer |
| Industry | Drug Mfg |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Laborer |
| Township / Ward | City Of Lowell |
| Est. Birth Year | ~1911 |
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 |
|---|---|---|---|---|
| Reuben Slater | Son | — | 12 | ~1918 |
| John Slater | Son | — | 19 | ~1911 |
| Alfred Slater | Son | — | 16 | ~1914 |
| James Slater | Head | — | 46 | ~1884 |
| Emma Slater | Spouse | — | 43 | ~1887 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 19
Middlesex, Massachusetts · implied b. ~1911 — 5 household members
| Surname | Slater |
| Given Name | John J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | England |
| Occupation | Laborer |
| Industry | Drug Mfg |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Head, age 29
Suffolk-County, Massachusetts · implied b. ~1911 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Slattery |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Brookfield |
| 1935 Residence (County) | Oxford |
| Occupation | Policeman |
| Industry | Municipal Police |
| Class of Worker | GW |
| Hours Worked | 54 |
| Income (1939) | 608 |
| Highest Grade | H-2 |
| 1935 Residence | Maine |
| 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 Slater across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Slater
Son · 1930 · age 19 · b. ~1911 · Massachusetts
★ You are viewing this record
Sibling
Reuben Slater
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Slater
Sibling · 1930 · age 16
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 — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel920:1026)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Isaac Smith | 52 | Head | Cobbler | Russia |
| 52 | Esther Smith | 49 | Wife | None | Russia |
| 53 | Irving Smith | 17 | Son | Stitcher | Massachusetts |
| 54 | Harry Smith | 14 | Son | None | Massachusetts |
| 55 | Bessie Smith | 25 | Daughter | Stitcher | Massachusetts |
| 56 | Daniel Rourke | 62 | Head | Fireman | Massachusetts |
| 57 | Mary Rourke | 52 | Wife | None | Irish Free State |
| 58 | Margaret Rourke | 24 | Daughter | Stitcher | Massachusetts |
| 59 | Ethel Rourke | 22 | Daughter | Stitcher | Massachusetts |
| 60 | Richard Rourke | 20 | Son | Laborer | Massachusetts |
| 61 | James A Slater | 46 | Head | Kilnsetter | Pennsylvania |
| 62 | Emma Slater | 43 | Wife | None | England |
| 63 | John J Slater THIS PERSON | 19 | Son | Laborer | Massachusetts |
| 64 | Alfred Slater | 16 | Son | Laborer | Massachusetts |
| 65 | Reuben B Slater | 12 | Son | None | Massachusetts |
| 66 | Joseph Cooper | 31 | Head | Clerk | England |
| 67 | Bertha Cooper | 30 | Wife | Stitcher | Canada-English |
| 68 | Hattie Mason | 53 | Mother-in-law | None | Canada-English |
| 69 | Mary Laurie | 63 | Head | Housekeeper | Canada-English |
| 70 | Arthur Barker | 61 | Brother | Laborer | Canada-English |
| 71 | Manuel Picanco | 33 | Head | Carpenter | Massachusetts |
| 72 | Beatrice Picanco | 35 | Wife | None | Portugal-Azores |
| 73 | Helen Hackett | 14 | Step-daughter | None | Massachusetts |
| 74 | — | None | — | — | — |
| 75 | — | None | — | — | — |
| 76 | — | None | — | — | — |
| 77 | — | None | — | — | — |
| 78 | — | None | — | — | — |
| 79 | — | None | — | — | — |
| 80 | — | None | — | — | — |
| 81 | — | None | — | — | — |
| 82 | — | None | — | — | — |
| 83 | — | None | — | — | — |
| 84 | — | None | — | — | — |
| 85 | — | None | — | — | — |
| 86 | — | None | — | — | — |
| 87 | — | None | — | — | — |
| 88 | — | None | — | — | — |
| 89 | — | None | — | — | — |
| 90 | — | None | — | — | — |
| 91 | — | None | — | — | — |
| 92 | — | None | — | — | — |
| 93 | — | None | — | — | — |
| 94 | — | None | — | — | — |
| 95 | — | None | — | — | — |
| 96 | — | None | — | — | — |
| 97 | — | None | — | — | — |
| 98 | — | None | — | — | — |
| 99 | — | None | — | — | — |
| 100 | — | None | — | — | — |
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)