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Mary Delaney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Delaney across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 8-person household.
Age 50
b. ~1890
Female
Spouse
Born: New Hampshire
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Delaney |
| Given Name | Mary J |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Waltham |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Township / Ward | Waltham |
| Est. Birth Year | ~1890 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Delaney | Daughter | — | 14 | ~1926 |
| William Delaney | Son | — | 18 | ~1922 |
| Margaret Delaney | Daughter | — | 20 | ~1920 |
| Mary Delaney | Daughter | — | 16 | ~1924 |
| John Delaney | Son | — | 17 | ~1923 |
| James Delaney | Son | — | 10 | ~1930 |
| Mary Delaney | Spouse | — | 50 | ~1890 |
| Thomas Delaney | Head | — | 54 | ~1886 |
Census Appearances
1930
Middlesex, Massachusetts
Other, age 40
Middlesex, Massachusetts · implied b. ~1890 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Delaney |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Age at First Marriage | 27 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Middlesex-County, Massachusetts
Spouse, age 50
Middlesex-County, Massachusetts · implied b. ~1890 — 8 household members
| Surname | Delaney |
| Given Name | Mary J |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Waltham |
| 1935 Residence (County) | Middlesex |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 Delaney across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Delaney
Spouse · 1940 · age 50 · b. ~1890 · 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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01619-01063)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Emily M Spinelli | 9 | Daughter | — | Mass |
| 42 | Mary C Spinelli | 5 | Daughter | — | Mass |
| 43 | Amelia Spinelli | 73 | Mother | — | Italy |
| 44 | Raymond H Codyer | 36 | Head | Sheet Metal Worker | Mass |
| 45 | Gertrude M Codyer | 36 | Wife | — | Mass |
| 46 | Marjorie M Codyer | 12 | Daughter | — | Mass |
| 47 | Richard Codyer | 11 | Son | — | Mass |
| 48 | David F Codyer | 9 | Son | — | Mass |
| 49 | John D Codyer | 7 | Son | — | Mass |
| 50 | Jean M Codyer | 5 | Daughter | — | Mass |
| 51 | Catherine F Kyle | 55 | Head | — | Mass |
| 52 | Paul J Kyle | 31 | Grandnephew | Postal Clerk | Mass |
| 53 | Patricia Kyle | 28 | Grandniece | — | Mass |
| 54 | Paul J Jr Kyle | 0 | Grandnephew | — | Mass |
| 55 | Margaret Hardiman | 76 | Head | — | Mass |
| 56 | John J Hardiman | 74 | Brother | — | Mass |
| 57 | Michael J Hardiman | 63 | Brother | Laborer | Mass |
| 58 | Roland Rousseau | 35 | Head | Spinner | Maine |
| 59 | Theresa A Rousseau | 31 | Wife | — | Canada French |
| 60 | Roland F Rousseau | 6 | Son | — | Mass |
| 61 | Richard F Rousseau | 5 | Son | — | Mass |
| 62 | Leona A Rousseau | 3 | Daughter | — | Mass |
| 63 | Eva J Rousseau | 0 | Daughter | — | Mass |
| 64 | Pasqualino Caia | 39 | Head | — | Italy |
| 65 | Concettina Caia | 31 | Wife | — | Italy |
| 66 | Vincenzo Caia | 6 | Son | Shoe Maker & Repairer | Italy |
| 67 | Thomas J Delaney | 54 | Head | Firelighter | Mass |
| 68 | Mary J Delaney THIS PERSON | 50 | Wife | — | New Hampshire |
| 69 | Margaret R Delaney | 20 | Daughter | Boxmaker | Mass |
| 70 | William P Delaney | 18 | Son | Delivery Boy | Mass |
| 71 | John B Delaney | 17 | Son | Delivery Boy | Mass |
| 72 | Mary G Delaney | 16 | Daughter | — | Mass |
| 73 | Mary J Delaney | 14 | Daughter | — | Mass |
| 74 | James Delaney | 10 | Son | — | Mass |
| 75 | Joseph O St. Pierre | 49 | Head | Time-Keeper | Maine |
| 76 | Gladys St. Pierre | 47 | Wife | — | Rhode Island |
| 77 | Donald St. Pierre | 22 | Son | — | Mass |
| 78 | Hannah J Ryan | 72 | Head | — | Massachusetts |
| 79 | Thomas F Ryan | 50 | Son | Laborer | Mass |
| 80 | Mary E Ryan | 46 | Daughter | — | Mass |
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)