MC
Mary Costello — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Camden-County, New Jersey
Our Model Tree links this Mary Costello across the 1920, 1930 and 1940 US Censuses in Camden-County, New Jersey (XGBoost, ~Confirmed) — first a spouse (b.~1897), then head of a 7-person household.
Age 43
b. ~1897
Female
Spouse
Born: Newfoundland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Camden-County, New Jersey |
| Surname | Costello |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Newfoundland |
| 1935 Residence (City) | Camden |
| 1935 Residence (County) | Camden |
| Naturalization Status | First papers filed |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Canada |
| Birthplace (normalized) | newfoundland |
| Township / Ward | Camden |
| Est. Birth Year | ~1897 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Costello | Daughter | — | 12 | ~1928 |
| Dorothy Costello | Daughter | — | 15 | ~1925 |
| Evelyn Costello | Daughter | — | 20 | ~1920 |
| Michael Costello | Head | — | 44 | ~1896 |
| Edward Costello | Son | — | 8 | ~1932 |
| Bernard Costello | Son | — | 19 | ~1921 |
| Mary Costello | Spouse | — | 43 | ~1897 |
Census Appearances
1920
Camden, New …
Spouse, age 23
Camden, New Jersey · implied b. ~1897 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Castello |
| Given Name | Mary C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Newfoundland |
| Year of Immigration | 1912 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Newfoundland |
| Mother's Birthplace | Newfoundland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Canada |
| Birthplace (normalized) | newfoundland |
1930
Philadelphia, Pennsylvania
Spouse, age 34
Philadelphia, Pennsylvania · implied b. ~1896 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costello |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Newfoundland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1916 |
| Age at First Marriage | 20 |
| Father's Birthplace | Newfoundland |
| Mother's Birthplace | Newfoundland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Canada |
| Birthplace (normalized) | newfoundland |
1940
Camden-County, New …
Spouse, age 43
Camden-County, New Jersey · implied b. ~1897 — 7 household members
| Surname | Costello |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Newfoundland |
| 1935 Residence (City) | Camden |
| 1935 Residence (County) | Camden |
| Naturalization Status | First papers filed |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Canada |
| Birthplace (normalized) | newfoundland |
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 Costello across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Costello
Spouse · 1940 · age 43 · b. ~1897 · New Jersey
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Camden-County, New Jersey
Open full size
1940 US Federal Census — Camden-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02396-00247)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ethel M. O'Neill | 50 | Head | Teacher | New Jersey |
| 2 | Dorothy Updike | 24 | Wife | Inspector | Pennsylvania |
| 3 | Adela H. Lofman | 24 | Daughter | Inspector | New Jersey |
| 4 | Dorothy Lofman | 22 | Daughter | Cigar Maker | New Jersey |
| 5 | Michael Jr. Lofman | 14 | Son | — | New Jersey |
| 6 | Frank Imbesi | 30 | Brother | Hat Cleaner | Italy |
| 7 | Thomas Creston | 62 | Lodger | Novelty Salesman | New Jersey |
| 8 | Stanley Baker | 32 | Servant | Painter | New Jersey |
| 9 | Helen Baker | 28 | Daughter | Cigar Maker | New Jersey |
| 10 | Bernard Cohen | 13 | Son | — | New Jersey |
| 11 | Mary Gadlo | 62 | Head | — | Poland |
| 12 | Anthony Gadlo | 25 | Son | Partner | New Jersey |
| 13 | Louis Gadlo | 36 | Son | Partner | Pennsylvania |
| 14 | Carl Gadlo | 34 | Son | Broommaker | Pennsylvania |
| 15 | Eve Gadlo | 29 | Daughter-in-law | — | Pennsylvania |
| 16 | Charles Gadlo | 40 | Son | Partner | Pennsylvania |
| 17 | Dorothy Gadlo | 10 | Granddaughter | — | New Jersey |
| 18 | Michael Costello | 44 | Head | Carpenter | Newfoundland |
| 19 | Mary Costello THIS PERSON | 43 | Wife | — | Newfoundland |
| 20 | Evelyn Costello | 20 | Daughter | Secretary | New Jersey |
| 21 | Bernard Costello | 19 | Son | Carpenter | New Jersey |
| 22 | Dorothy Costello | 15 | Daughter | — | New Jersey |
| 23 | Eleanor Costello | 12 | Daughter | — | New Jersey |
| 24 | Edward Costello | 8 | Son | — | New Jersey |
| 25 | Philip Kirks | 41 | Head | Laborer | Pennsylvania |
| 26 | Mary Kirks | 36 | Wife | — | New Jersey |
| 27 | Edward Kirks | 17 | Son | New Worker | New Jersey |
| 28 | Lorraine Kirks | 2 | Daughter | — | New Jersey |
| 29 | Henry Heunisch | 55 | Head | Foreman | Austria |
| 30 | Hedwig Heunisch | 53 | Wife | — | Germany |
| 31 | James O'Leary | 33 | Head | Bartender | New Jersey |
| 32 | Stella O'Leary | 32 | Wife | Cigar Maker | New Jersey |
| 33 | Barbara O'Leary | 2 | Daughter | — | New Jersey |
| 34 | Josephine Christian | 50 | Head | Cigar Maker | Poland |
| 35 | Helen Christian | 25 | Daughter | Waitress | New Jersey |
| 36 | Jean Christian | 22 | Daughter | Waitress | New Jersey |
| 37 | Fannie Christian | 21 | Daughter | Waitress | New Jersey |
| 38 | Nellie Christian | 17 | Daughter | — | New Jersey |
| 39 | Bernice Christian | 14 | Daughter | — | New Jersey |
| 40 | Sophie Hageman | 58 | Head | Washer | Switzerland |
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)