MD
Mary Day — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Day across the 1920, 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1866), then head of a 3-person household.
Age 74
b. ~1866
Female
Head
Born: Massachusetts
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Day |
| Given Name | Mary E |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Widowed |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Amesbury Town |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Industry | H |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Amesbury Town |
| Est. Birth Year | ~1866 |
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 |
|---|---|---|---|---|
| Beatrice Day | Daughter | — | 37 | ~1903 |
| Mary Day | Head | — | 74 | ~1866 |
| Alexander Caldwell | Other | — | 39 | ~1901 |
Census Appearances
1920
Essex, Massachusetts
Other, age 51
Essex, Massachusetts · implied b. ~1869 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Mary |
| Relationship to Head | Sister |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Widowed |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Stitcher |
| Industry | Shoe Shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Other, age 63
Essex, Massachusetts · implied b. ~1867
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Day |
| Given Name | Mary E. |
| Relationship to Head | Head-H |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Massachusetts |
| Occupation | Carpenter |
| Industry | Jewelry Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Head, age 74
Essex-County, Massachusetts · implied b. ~1866 — 3 household members
| Surname | Day |
| Given Name | Mary E |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 74 |
| Marital Status | Widowed |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Amesbury Town |
| 1935 Residence (County) | Essex |
| Industry | H |
| 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 Mary Day across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Day
Head · 1940 · age 74 · b. ~1866 · Massachusetts
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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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01577-00220)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marion E Connors | 47 | Wife | — | Massachusetts |
| 42 | Rhoda Ann Connors | 6 | Daughter | — | Massachusetts |
| 43 | Arthur R Twomey | 27 | Brother-in-law | Sales Clerk | Massachusetts |
| 44 | Nora A Moran | 60 | Head | Bookkeeping Typing | Massachusetts |
| 45 | Grace H Leslie | 73 | Head | — | New Hampshire |
| 46 | Etta W Hatch | 79 | Head | — | New Hampshire |
| 47 | Annie E West | 76 | Head | — | Massachusetts |
| 48 | Hubert R Jr Jennings | 29 | Grandson | Stock Clerk | Massachusetts |
| 49 | Julia P Combes | 83 | Head | — | Massachusetts |
| 50 | Addie M Putney | 85 | Sister | — | Massachusetts |
| 51 | Irving N Chase | 65 | Head | Lumber Operator | New Hampshire |
| 52 | Emma J Chase | 64 | Wife | — | Massachusetts |
| 53 | Warren E Killam | 24 | Son-in-law | Farming | Massachusetts |
| 54 | Lydia B Killam | 31 | Daughter | — | Massachusetts |
| 55 | Lydia J Killam | 0 | Granddaughter | — | Massachusetts |
| 56 | Mary E Day THIS PERSON | 74 | Head | — | Massachusetts |
| 57 | Beatrice C Day | 37 | Daughter | Clerical Typist | Massachusetts |
| 58 | Alexander G Caldwell | 39 | Boarder | Actor | Massachusetts |
| 59 | Joseph F O'Neil | 55 | Head | Tipper | Massachusetts |
| 60 | Mary C O'Neil | 52 | Wife | — | Massachusetts |
| 61 | William A O'Neil | 24 | Son | Multi Roller Machine Operator | Massachusetts |
| 62 | Eleanor C O'Neil | 18 | Daughter | — | Massachusetts |
| 63 | Thomas H Sr Sullivan | 42 | Head | Drying Room | Massachusetts |
| 64 | Catherine T Sullivan | 39 | Wife | — | Massachusetts |
| 65 | Jean M Sullivan | 10 | Daughter | — | Massachusetts |
| 66 | Thomas H Jr Sullivan | 7 | Son | — | Massachusetts |
| 67 | Robert F Sullivan | 4 | Son | — | Massachusetts |
| 68 | Joseph H Frost | 43 | Head | Salesman | Massachusetts |
| 69 | Dorothy H Frost | 42 | Wife | — | Massachusetts |
| 70 | Joseph H Frost | 17 | Son | — | Massachusetts |
| 71 | Robert G Frost | 9 | Son | — | Massachusetts |
| 72 | Judson C Austin | 62 | Head | Caretaker | Massachusetts |
| 73 | Myrtie M Austin | 58 | Wife | — | Massachusetts |
| 74 | Charlene P Pollard | 69 | Lodger | — | Massachusetts |
| 75 | Catherine S Mahoney | 47 | Head | Clerical-Typist | Massachusetts |
| 76 | William J Mahoney | 38 | Head | Bricklaying | Massachusetts |
| 77 | Mildred P Mahoney | 35 | Wife | — | Massachusetts |
| 78 | Helen E Mahoney | 15 | Daughter | — | Massachusetts |
| 79 | Mary C Mahoney | 11 | Daughter | — | Massachusetts |
| 80 | William J Jr Mahoney | 2 | Son | — | Massachusetts |
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)