MD
Mary Durham — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Durham across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 10-person household.
Age 45
b. ~1895
Female
Spouse
Born: Irish Free State
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Durham |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Practical nurse |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 170 |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
| Occupation | Practical Nurse |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1895 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Brendan Durham | Son | — | 14 | ~1926 |
| Dorothy Durham | Daughter | — | 11 | ~1929 |
| Alice Durham | Daughter | — | 18 | ~1922 |
| Robert Durham | Son | — | 3 | ~1937 |
| Mary Durham | Spouse | — | 45 | ~1895 |
| Joan Durham | Daughter | — | 6 | ~1934 |
| Rita Durham | Daughter | — | 20 | ~1920 |
| Margaret Durham | Daughter | — | 22 | ~1918 |
| William Durham | Head | — | 45 | ~1895 |
| Eleanor Durham | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Middlesex, Massachusetts
Other, age 31
Middlesex, Massachusetts · implied b. ~1899 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Durham |
| Given Name | Margaret M. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| Naturalization Status | Naturalized |
| Year of Immigration | 1915 |
| Age at First Marriage | 23 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birthplace (normalized) | irish free state |
1940
Middlesex-County, Massachusetts
Spouse, age 45
Middlesex-County, Massachusetts · implied b. ~1895 — 10 household members
| Surname | Durham |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Lowell City |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Occupation | Practical nurse |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 170 |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
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 Durham across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Durham
Spouse · 1940 · age 45 · b. ~1895 · 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-t0627-01694-00506)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clare Delehanty | 13 | Daughter | — | Massachusetts |
| 42 | John Jr Delehanty | 10 | Son | — | Massachusetts |
| 43 | Mary Callahan | 64 | Mother-in-law | — | Rhode Island |
| 44 | Thomas E Hill | 25 | Head | Waste Sorter | Massachusetts |
| 45 | Lillian Hill | 25 | Wife | — | Massachusetts |
| 46 | Lillian Hill | 3 | Daughter | — | Massachusetts |
| 47 | Thomas Hill | 1 | Son | — | Massachusetts |
| 48 | Joseph Marie | 53 | Head | Spinner | Canada-French |
| 49 | Emma J Marie | 52 | Wife | — | Vermont |
| 50 | Ernest J Marie | 22 | Son | Shoe Worker | Massachusetts |
| 51 | Geraldine Marie | 18 | Daughter | — | Massachusetts |
| 52 | Albert Marie | 15 | Son | — | Massachusetts |
| 53 | Helene Marie | 9 | Daughter | — | Massachusetts |
| 54 | Lillian Macdonald | 29 | Daughter | — | Massachusetts |
| 55 | Clifford Macdonald | 6 | Son | — | Massachusetts |
| 56 | Roland Dinsmore | 23 | Son-in-law | Labour | Massachusetts |
| 57 | Rita Dinsmore | 20 | Daughter | — | Massachusetts |
| 58 | Roland Jr Dinsmore | 2 | Grandson | — | Massachusetts |
| 59 | Charles Normandin | 21 | Nephew | Gas Attendant | Massachusetts |
| 60 | Albina Thibeault | 72 | Sister | — | Vermont |
| 61 | William Durham | 45 | Head | Machinist | Massachusetts |
| 62 | Mary E Durham THIS PERSON | 45 | Wife | Practical Nurse | Irish Free State |
| 63 | Margaret Durham | 22 | Daughter | — | Massachusetts |
| 64 | Rita Durham | 20 | Daughter | Home Work | Massachusetts |
| 65 | Alice Durham | 18 | Daughter | — | Massachusetts |
| 66 | Brendan Durham | 14 | Son | — | Massachusetts |
| 67 | Dorothy Durham | 11 | Daughter | — | Massachusetts |
| 68 | Eleanor Durham | 9 | Daughter | — | Massachusetts |
| 69 | Joan Marie Durham | 6 | Daughter | — | Massachusetts |
| 70 | Robert Durham | 3 | Son | — | Massachusetts |
| 71 | Thomas J Mcmahon | 39 | Head | Machinist | Massachusetts |
| 72 | Lawrence Mcmahon | 29 | Brother | Leather Worker | Massachusetts |
| 73 | Maurice J Mcmahon | 28 | Brother | Sprayer | Massachusetts |
| 74 | Arthur J Mcmahon | 42 | Head | Polisher | Massachusetts |
| 75 | Margaret Mcmahon | 40 | Wife | — | Massachusetts |
| 76 | Marion Mcmahon | 18 | Daughter | Clerk | Massachusetts |
| 77 | Arthur Jr Mcmahon | 13 | Son | — | Massachusetts |
| 78 | Edward Mcmahon | 9 | Son | — | Massachusetts |
| 79 | Rachel Mcelroy | 54 | Head | — | Massachusetts |
| 80 | Ellen Mcelroy | 52 | Sister | Twister | 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)