MH
Mary Hammond — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Essex, New Jersey
Our Model Tree links this Mary Hammond across the 1930 and 1940 US Censuses in Essex, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 13-person household.
Age 9
b. ~1921
Female
Daughter
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, New Jersey |
| Surname | Hammond |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Bloomfield Town |
| Est. Birth Year | ~1921 |
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.
13 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Hammond | Daughter | — | 9 | ~1921 |
| Alice Hammond | Daughter | — | 3 | ~1927 |
| Ruth Hammond | Daughter | — | 18 | ~1912 |
| William Hammond | Head | — | 47 | ~1883 |
| Edward Hammond | Son | — | 7 | ~1923 |
| William Hammond | Son | — | 20 | ~1910 |
| Thomas Hammond | Son | — | 17 | ~1913 |
| George Hammond | Son | — | 5 | ~1925 |
| James Hammond | Son | — | 15 | ~1915 |
| Joseph Hammond | Son | — | 1 | ~1929 |
| Robert Hammond | Son | — | 11 | ~1919 |
| John Hammond | Son | — | 13 | ~1917 |
| Annie Hammond | Spouse | — | 41 | ~1889 |
Census Appearances
1930
Essex, New …
Daughter, age 9
Essex, New Jersey · implied b. ~1921 — 13 household members
| Surname | Hammond |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Essex-County, New …
Daughter, age 20
Essex-County, New Jersey · implied b. ~1920 — 16 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hammond |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Newark |
| 1935 Residence (County) | Essex |
| Industry | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Hammond across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hammond
Daughter · 1930 · age 9 · b. ~1921 · New Jersey
★ You are viewing this record
Sibling
Thomas Hammond
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Hammond
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Hammond
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Hammond
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Hammond
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Hammond
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Hammond
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Hammond
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Hammond
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Hammond
Sibling · 1930 · age 5
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, New Jersey
Open full size
1930 US Federal Census — Essex, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1372:0746)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Frances | 51 | Head | — | New Jersey |
| 52 | Mary | 21 | Daughter | — | New Jersey |
| 53 | Edith | 22 | Daughter | — | New Jersey |
| 54 | William | 20 | Son | — | New Jersey |
| 55 | Morgan | 17 | Son | — | New Jersey |
| 56 | John | 15 | Son | — | New Jersey |
| 57 | Martin J. Donnelly | 47 | Head | Gardener | Irish Free State |
| 58 | Annie E. Donnelly | 42 | Wife | — | Irish Free State |
| 59 | Edward M. Donnelly | 11 | Son | — | New Jersey |
| 60 | Vincent Donnelly | 9 | Son | — | New Jersey |
| 61 | Alice Snyder | 61 | Head | — | Irish Free State |
| 62 | William Snyder | 23 | Son | Chauffeur | New Jersey |
| 63 | Mary Sweeney | 57 | Head | — | Irish Free State |
| 64 | Annie Sweeney | 23 | Daughter | — | New Jersey |
| 65 | Edward Sweeney | 21 | Son | Clerk | New Jersey |
| 66 | Alice Sweeney | 17 | Daughter | — | New Jersey |
| 67 | William Hammond | 47 | Head | Chauffeur | New Jersey |
| 68 | Annie M. Hammond | 41 | Wife | — | New Jersey |
| 69 | William Hammond | 20 | Son | Laundry | New Jersey |
| 70 | Ruth Hammond | 18 | Daughter | — | New Jersey |
| 71 | Thomas Hammond | 17 | Son | — | New Jersey |
| 72 | James Hammond | 15 | Son | — | New Jersey |
| 73 | John Hammond | 13 | Son | — | New Jersey |
| 74 | Robert Hammond | 11 | Son | — | New Jersey |
| 75 | Mary Hammond THIS PERSON | 9 | Daughter | — | New Jersey |
| 76 | Edward Hammond | 7 | Son | — | New Jersey |
| 77 | George Hammond | 5 | Son | — | New Jersey |
| 78 | Alice Hammond | 3 | Daughter | — | New Jersey |
| 79 | Joseph Hammond | 1 | Son | — | New Jersey |
| 80 | James Hammond | 21 | Head | Chauffeur | New Jersey |
| 81 | Mary Hammond | 21 | Wife | — | New Jersey |
| 82 | James Hammond | 2 | Son | — | New Jersey |
| 83 | William Hammond | 1 | Son | — | New Jersey |
| 84 | William Hammond | 48 | Head | — | New Jersey |
| 85 | Mary Hammond | 42 | Wife | — | New Jersey |
| 86 | William Hammond | 12 | Son | — | New Jersey |
| 87 | Mary Hammond | 10 | Daughter | — | New Jersey |
| 88 | John Hammond | 6 | Son | — | New Jersey |
| 89 | Edward Hammond | 1 | Son | — | New Jersey |
| 90 | William Hammond | 45 | Head | Painter | Connecticut |
| 91 | Mary Hammond | 43 | Wife | — | New York |
| 92 | William Hammond | 3 | Son | — | Connecticut |
| 93 | Mary Hammond | 1 | Daughter | — | Connecticut |
| 94 | William Hammond | 45 | Head | — | New Jersey |
| 95 | Mary Hammond | 42 | Wife | — | New Jersey |
| 96 | William Hammond | 21 | Son | — | New Jersey |
| 97 | Mary Hammond | 18 | Daughter | — | New Jersey |
| 98 | John Hammond | 15 | Son | — | New Jersey |
| 99 | Edward Hammond | 12 | Son | — | New Jersey |
| 100 | Alice Hammond | 9 | Daughter | — | New Jersey |
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)