MD
Mary Day — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this Mary Day across the 1920, 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1871), then head of a 3-person household.
Age 69
b. ~1871
Female
Head
Born: England
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | Day |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 69 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Summit city |
| 1935 Residence (County) | Union |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Summit City |
| Est. Birth Year | ~1871 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Day | Daughter | — | 29 | ~1911 |
| Mary Day | Head | — | 69 | ~1871 |
| Lernicola Jerry | Other | — | 30 | ~1910 |
Census Appearances
1920
Union, New …
Spouse, age 42
Union, New Jersey · implied b. ~1878 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1930
Union, New …
Other, age 55
Union, New Jersey · implied b. ~1875 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Mary M. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1900 |
| Age at First Marriage | 31 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Union-County, New …
Head, age 69
Union-County, New Jersey · implied b. ~1871 — 3 household members
| Surname | Day |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 69 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Summit city |
| 1935 Residence (County) | Union |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Day across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Day
Head · 1940 · age 69 · b. ~1871 · New Jersey
★ You are viewing this record
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
34 people indexed on this census page (nara:1940:m-t0627-02389-00637)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Albert Eckert | 31 | Head | Waiter | Germany |
| 42 | Evelyn Eckert | 22 | Wife | — | Pennsylvania |
| 43 | George Shea | 52 | Head | Fireman | New Jersey |
| 44 | Mildred Shea | 48 | Wife | — | New Jersey |
| 45 | William De Hart | 33 | Head | Teller | New Jersey |
| 46 | De Hart | 34 | Wife | — | Rhode Island |
| 47 | Vincent Hall | 52 | Head | — | New York |
| 48 | Hattie Hall | 51 | Wife | — | New York |
| 49 | Ralph O. Hall | 21 | Son | Salesman | New Jersey |
| 50 | Walter Nicholson | 56 | Head | Salesman | New York |
| 51 | Claudine Nicholson | 44 | Wife | — | Illinois |
| 52 | Alice Nicholson | 23 | Daughter | Salesgirl | New York |
| 53 | Lucie Truncheon | 45 | Head | — | New Jersey |
| 54 | Helen Coeyman | 66 | Sister | Salesgirl | New Jersey |
| 55 | William Brown | 56 | Head | Salesman | Scotland |
| 56 | Sarah Skidmore | 80 | Lodger | — | England |
| 57 | Rosemary Bell | 17 | Niece | — | New Jersey |
| 58 | John Shade | 58 | Head | Janitor | England |
| 59 | Edith Shade | 58 | Wife | Proprietor | England |
| 60 | Arthur Scott | 38 | Head | Salesman | England |
| 61 | Maria Scott | 39 | Wife | — | Germany |
| 62 | Lulu Scott | 4 | Daughter | — | China |
| 64 | — | 26 | — | — | New Jersey |
| 65 | Mary Day THIS PERSON | 69 | Head | — | England |
| 66 | Dorothy Day | 29 | Daughter | Teacher | New Jersey |
| 67 | Lernicola Jerry | 30 | Lodger | Cab Driver | New Jersey |
| 71 | John Nollift | 83 | Head | Editor | New York |
| 74 | Jesse Stout | 59 | Head | Assessor | New Jersey |
| 75 | Etta Stout | 54 | Wife | — | New Jersey |
| 76 | Katherine Long | 57 | Lodger | — | New Jersey |
| 77 | William Hopper | 71 | Lodger | Collector & Messenger | New York |
| 78 | William Elliott | 59 | Head | Sexton | England |
| 79 | Frances Elliott | 47 | Wife | — | England |
| 80 | Ethel Elliott | 30 | Daughter | Trained Nurse | England |
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)