MC
Mary Crosby — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this Mary Crosby across the 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 9-person household.
Age 19
b. ~1921
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | Crosby |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth city |
| 1935 Residence (County) | Union |
| Additional Details | |
| Occupation | Laborer |
| Industry | electric appliances |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 288 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Laborer |
| Township / Ward | Elizabeth City |
| 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alfred Crosby | Son | — | 11 | ~1929 |
| Winifred Kearney | Other | — | 80 | ~1860 |
| John Crosby | Head | — | 56 | ~1884 |
| Ann Crosby | Daughter | — | 16 | ~1924 |
| William Crosby | Son | — | 8 | ~1932 |
| John Crosby | Son | — | 17 | ~1923 |
| Mary Crosby | Daughter | — | 19 | ~1921 |
| Crosby | Spouse | — | 50 | ~1890 |
| Stephen Crosby | Son | — | 14 | ~1926 |
Census Appearances
1930
Union, New …
Daughter, age 9
Union, New Jersey · implied b. ~1921 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crosby |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New York |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Union-County, New …
Daughter, age 19
Union-County, New Jersey · implied b. ~1921 — 9 household members
| Surname | Crosby |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth city |
| 1935 Residence (County) | Union |
| Occupation | Laborer |
| Industry | electric appliances |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 288 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| 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 Crosby across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Crosby
Daughter · 1940 · age 19 · b. ~1921 · New Jersey
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Sibling
Ann Crosby
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stephen Crosby
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Crosby
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Crosby
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Crosby
Sibling · 1940 · 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
1940 US Federal Census — Union-County, New Jersey
Open full size
1940 US Federal Census — Union-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02397-00610)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Michael Mulraney | 21 | son | Shipping Clerk | Pennsylvania |
| 2 | Mary Mulraney | 19 | daughter | Multigraph Operator | New Jersey |
| 3 | Matie Mulraney | 17 | son | Labour | New Jersey |
| 4 | Theresa Pinkosavage | 29 | Head | — | New Jersey |
| 5 | Blank | None | — | — | — |
| 6 | Frank Lukowich | 49 | Head | Helper Machinist | Russia |
| 7 | Sadie Lukowich | 45 | wife | — | Poland |
| 8 | Mascia Eladio | 38 | Head | Laborer | Spain |
| 9 | Christine Eladio | 34 | wife | — | Spain |
| 10 | David Eladio | 9 | son | — | New Jersey |
| 11 | Simon Boublier | 30 | Head | Store Clerk | Ohio |
| 12 | Helen Boublier | 26 | wife | Counter Girl | New Jersey |
| 13 | Angelia Zajac | 63 | Head | — | Poland |
| 14 | John Zajac | 25 | son | Laborer | New Jersey |
| 15 | Mary Mc Gowan | 44 | Head | Bookkeeper | New York |
| 16 | Mary C. Ryan | 54 | Head | Clerk | New Jersey |
| 17 | E. Frances Ryan | 51 | sister | — | New Jersey |
| 18 | Daniel Tracey | 51 | Head | Policeman | Ireland |
| 19 | Helen Tracey | 28 | daughter | Teller | New Jersey |
| 20 | Mary Tracey | 25 | daughter | Machine Operator | New Jersey |
| 21 | Daniel Tracey | 23 | son | Machinist | New Jersey |
| 22 | Hugh Tracey | 22 | son | Timekeeper | New Jersey |
| 23 | Sadie Tracey | 20 | daughter | — | New Jersey |
| 24 | Alice Tracey | 17 | daughter | — | New Jersey |
| 25 | Sarah Tracey | 16 | daughter | — | New Jersey |
| 26 | John Crosby | 56 | Head | Attendant | New Jersey |
| 27 | Nan Crosby | 50 | wife | — | New Jersey |
| 28 | Mary Crosby THIS PERSON | 19 | daughter | Laborer | New Jersey |
| 29 | John Crosby | 17 | son | Laborer | New Jersey |
| 30 | Ann Crosby | 16 | daughter | — | New Jersey |
| 31 | Stephen Crosby | 14 | son | — | New Jersey |
| 32 | Alfred Crosby | 11 | son | — | New Jersey |
| 33 | William Crosby | 8 | son | — | New Jersey |
| 34 | Winifred Kearney | 80 | mother-in-law | — | New Jersey |
| 35 | Barnet Lipshitz | 54 | Head | Mason | Russia |
| 36 | Rebecca Lipshitz | 56 | wife | — | New York |
| 37 | Joseph Mooney | 36 | Head | Poultry Man | New York |
| 38 | Marguerite Mooney | 23 | wife | — | New Jersey |
| 39 | Judah John Mooney | 26 | son | Painter | New Jersey |
| 40 | Dominick Scaluffi | 38 | Head | Shipper | New York |
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)