JH
John Hart — 1930 US Census Record
Model Tree available1930 United States Federal Census · Essex, Massachusetts
Our Model Tree links this John Hart across the 1920, 1930 and 1940 US Censuses in Essex, Massachusetts (XGBoost, ~Confirmed), with identified parents Michael & Mary — first a son (b.~1916), then head of a 4-person household.
Age 14
b. ~1916
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, Massachusetts |
| Surname | Hart |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lawrence City |
| Est. Birth Year | ~1916 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Hart | Daughter | — | 17 | ~1913 |
| Michael Hart | Head | — | 46 | ~1884 |
| John Hart | Son | — | 14 | ~1916 |
| Mary Hart | Spouse | — | 46 | ~1884 |
Census Appearances
1920
Essex, Massachusetts
Son, age 4
Essex, Massachusetts · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Son, age 14
Essex, Massachusetts · implied b. ~1916 — 4 household members
| Surname | Hart |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Head, age 23
Essex-County, Massachusetts · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hard |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lynn City |
| 1935 Residence (County) | Essex |
| Occupation | Knotter |
| Industry | Mattress factory |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 920 |
| Highest Grade | Hs 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 Hart across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Michael Hart (~0.92 confidence) and mother Mary Hart (~0.92 confidence) and father John Hart (~0.92 confidence) and mother Margaret Hart (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Hart
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Mary Hart
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
John Hart
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Margaret Hart
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Hart
Son · 1930 · age 14 · b. ~1916 · Massachusetts
★ You are viewing this record
Sibling
Margaret Hart
Sibling · 1930 · age 17
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 — Essex, Massachusetts
Open full size
1930 US Federal Census — Essex, Massachusetts
Page Contents
49 people indexed on this census page (ia:1930:massachusettscensus00reel897:0870)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Robert Agnew | 35 | Head | Instructor | Massachusetts |
| 52 | Margaret Agnew | 35 | Wife | — | Massachusetts |
| 53 | Robert Agnew | 11 | Son | — | Massachusetts |
| 54 | Thomas Mulvey | 53 | Head | Foreman | New York |
| 55 | Mary E Mulvey | 53 | Wife | — | Massachusetts |
| 56 | Mary B Mulvey | 21 | Daughter | Teacher | Massachusetts |
| 57 | Alice Mulvey | 17 | Daughter | Typist | Massachusetts |
| 58 | Angelo Domenico | 38 | Head | Maintenance | Italy |
| 59 | Mary Domenico | 34 | Wife | — | Italy |
| 60 | Robert Domenico | 8 | Son | — | Massachusetts |
| 61 | Charles Domenico | 1 | Son | — | New York |
| 62 | Abraham Mcrubin | 45 | Head | Merchant | Russia |
| 63 | Jennie Mcrubin | 40 | Wife | — | Russia |
| 64 | Ida Mcrubin | 18 | Daughter | — | Massachusetts |
| 65 | Sarah Mcrubin | 15 | Daughter | — | Massachusetts |
| 66 | Molly Mcrubin | 12 | Daughter | — | Massachusetts |
| 67 | Thomas Finn | 45 | Head | — | Massachusetts |
| 68 | Agnes Finn | 45 | Wife | — | Massachusetts |
| 69 | Mary Finn | 15 | Daughter | — | Massachusetts |
| 70 | Thomas Finn | 13 | Son | — | Massachusetts |
| 71 | Margaret Finn | 75 | Mother | — | Massachusetts |
| 72 | Hyman Goldman | 50 | Head | Merchant | Russia |
| 73 | Ida Goldman | 50 | Wife | — | Russia |
| 74 | Mary Goldman | 23 | Daughter | Saleswoman | Massachusetts |
| 75 | Alfred Sharp | 60 | Head | — | England |
| 76 | Ruth Sharp | 57 | Wife | Stitcher | England |
| 77 | Alice Sharp | 31 | Daughter | — | Massachusetts |
| 78 | John Sharp | 33 | Nephew | Laborer | Massachusetts |
| 79 | John Develin | 47 | Head | Baker | Holland |
| 80 | Antoinette Develin | 47 | Wife | — | Holland |
| 81 | Henry Develin | 22 | Son | Baker | New Jersey |
| 82 | John Develin | 18 | Son | — | New Jersey |
| 83 | Walter Develin | 15 | Son | — | New Jersey |
| 84 | Cornelius Develin | 11 | Son | — | New York |
| 85 | Galona Develin | 18 | Daughter in law | — | Maryland |
| 87 | George Logan | 33 | Head | — | Massachusetts |
| 88 | Florence Logan | 31 | Wife | Stitcher | Massachusetts |
| 89 | Leo Logan | 3 | Son | — | Massachusetts |
| 90 | Richard Mchugh | 57 | Head | Stitcher | Massachusetts |
| 91 | Anna Mchugh | 57 | Wife | — | Massachusetts |
| 92 | Russell Mchugh | 24 | Son | — | Massachusetts |
| 93 | John Mchugh | 19 | Son | — | Massachusetts |
| 94 | William Westerdahl | 33 | Head | Carpenter | England |
| 95 | Theresa Westerdahl | 31 | Wife | — | Massachusetts |
| 96 | William Westerdahl | 9 | Son | — | Massachusetts |
| 97 | Michael Hart | 46 | Head | Fireman | Massachusetts |
| 98 | Mary Hart | 46 | Wife | — | Massachusetts |
| 99 | Margaret Hart | 17 | Daughter | — | Massachusetts |
| 100 | John Hart THIS PERSON | 14 | Son | — | Massachusetts |
Pedigree Summary
John + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)