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Mary Tierney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Tierney across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Michael & Nellie — first a spouse (b.~1912), then head of a 5-person household.
Age 28
b. ~1912
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Tierney |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Maynard Town |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Maynard Town |
| Est. Birth Year | ~1912 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Gerald Tierney | Head | — | 29 | ~1911 |
| Mary Tierney | Spouse | — | 28 | ~1912 |
| Gladys Tierney | Other | — | 34 | ~1906 |
| Gerald Tierney | Son | — | 5 | ~1935 |
| John Tierney | Daughter | — | 4 | ~1936 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 7
Middlesex, Massachusetts · implied b. ~1913 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tierney |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 17
Middlesex, Massachusetts · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tierney |
| Given Name | Margaret A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 28
Middlesex-County, Massachusetts · implied b. ~1912 — 5 household members
| Surname | Tierney |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Maynard Town |
| 1935 Residence (County) | Middlesex |
| Income (1939) | 0 |
| Highest Grade | H-3 |
| 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 Tierney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Michael Tierney (~0.92 confidence) and mother Nellie Tierney (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Tierney
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Nellie Tierney
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Tierney
Spouse · 1940 · age 28 · b. ~1912 · Massachusetts
★ 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 — 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-t0627-01610-00478)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Guy A. Brayden | 56 | Wife | — | Massachusetts |
| 2 | Amy A. Brayden | 56 | Wife | — | Massachusetts |
| 3 | Bertha A. Feakes | 64 | Head | — | Massachusetts |
| 4 | Edward Feakes | 29 | Son | Chemist | Massachusetts |
| 5 | Alice Feakes | 27 | Daughter | School Teacher | Massachusetts |
| 6 | Frances Feakes | 23 | Daughter | Secretary | Massachusetts |
| 7 | Gerald Tierney | 29 | Head | Counter Man | Massachusetts |
| 8 | Mary Tierney THIS PERSON | 28 | Wife | — | Massachusetts |
| 9 | Gerald Tierney | 5 | Son | — | Massachusetts |
| 10 | John Tierney | 4 | Daughter | — | Massachusetts |
| 11 | Gladys G. Tierney | 34 | Sister-in-law | Credit Manager | Massachusetts |
| 12 | Luke J. Hannan | 60 | Head | Spanner | Massachusetts |
| 13 | Catherine A. Hannan | 59 | Wife | — | Massachusetts |
| 14 | Norman A. Hannan | 22 | Son | Manager | Massachusetts |
| 15 | Ellen Connolly | 85 | Mother-in-law | — | Massachusetts |
| 16 | Thomas W. Connolly | 72 | Brother-in-law | — | Massachusetts |
| 17 | Eva Tucker | 38 | Head | Weaver | Massachusetts |
| 18 | Catherine E. Hoffman | 40 | Head | — | Massachusetts |
| 19 | John Hoffman | 16 | Son | — | Massachusetts |
| 20 | Ann Hoffman | 13 | Daughter | — | Massachusetts |
| 21 | Frank Hoffman | 7 | Son | — | Massachusetts |
| 22 | Arlene Hoffman | 6 | Daughter | — | Massachusetts |
| 23 | Albert Murphy | 44 | Head | Proprietor | Massachusetts |
| 24 | Alice Murphy | 45 | Wife | — | Massachusetts |
| 25 | George Murphy | 24 | Son | Printer | Massachusetts |
| 26 | Raymond Murphy | 20 | Son | Printer | Massachusetts |
| 27 | Eleanor Murphy | 19 | Daughter | — | Massachusetts |
| 28 | Albert Murphy | 13 | Son | — | Massachusetts |
| 29 | Patricia Murphy | 9 | Daughter | — | Massachusetts |
| 30 | Eden J. John | 46 | Head | Painter | New Hampshire |
| 31 | Eleanor John | 42 | Wife | — | Massachusetts |
| 32 | William John | 4 | Son | — | Massachusetts |
| 33 | Joseph A. Foster | 57 | Head | Carpenter | Massachusetts |
| 34 | Flora Foster | 57 | Wife | — | Massachusetts |
| 35 | Albert J. Foster | 27 | Son | Carpenter | Massachusetts |
| 36 | Sybil M. White | 50 | Head | School Teacher | Massachusetts |
| 37 | Isabel G. White | 51 | Sister | — | Massachusetts |
| 38 | Susannah S. White | 74 | Mother | — | Canada |
| 39 | Marshall Frye | 22 | Nephew | Weaver | Massachusetts |
| 40 | Parmiter End Of | None | Ave. | — | — |
Pedigree Summary
Mary
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)