JT
John Tierney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Tierney across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 7-person household.
Age 16
b. ~1924
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Tierney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1924 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Tierney | Son | — | 16 | ~1924 |
| John Tierney | Head | — | 56 | ~1884 |
| Mary Tierney | Spouse | — | 50 | ~1890 |
| Margaret Tierney | Daughter | — | 19 | ~1921 |
| Dorothy Tierney | Daughter | — | 17 | ~1923 |
| Helen Tierney | Daughter | — | 14 | ~1926 |
| George Tierney | Son | — | 11 | ~1929 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 5
Suffolk, Massachusetts · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tierney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 16
Suffolk-County, Massachusetts · implied b. ~1924 — 7 household members
| Surname | Tierney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 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 John Tierney across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Tierney
Son · 1940 · age 16 · b. ~1924 · Massachusetts
★ You are viewing this record
Sibling
Dorothy Tierney
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Tierney
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Tierney
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Tierney
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01682-00251)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thelma Mooney | 7 | Daughter | — | Massachusetts |
| 2 | Russell W. Monte | 36 | Head | Asst. Treasurer | Massachusetts |
| 3 | Martha A. Monte | 77 | Mother | — | Massachusetts |
| 4 | Esther B. Monte | 42 | Sister | — | Massachusetts |
| 5 | Albert Maraggia | 27 | Head | Machine Operator | Massachusetts |
| 6 | Lucy Maraggia | 26 | Wife | — | Italy |
| 7 | Virginia Maraggia | 3 | Daughter | — | Massachusetts |
| 8 | Barbara Maraggia | 1 | Daughter | — | Massachusetts |
| 9 | John Edry | 46 | Head | Laborer | Poland |
| 10 | Dominica Edry | 46 | Wife | — | Poland |
| 11 | Walter Edry | 24 | Son | Laborer | Massachusetts |
| 12 | John Edry | 21 | Son | Laborer | Massachusetts |
| 13 | Wanda Edry | 20 | Daughter | Inspector | Massachusetts |
| 14 | Adele Edry | 18 | Daughter | Presser | Massachusetts |
| 15 | Stanley Edry | 16 | Son | — | Massachusetts |
| 16 | Edmund Edry | 14 | Son | — | Massachusetts |
| 17 | Joseph Fitzpatrick | 26 | Head | Chauffeur | Massachusetts |
| 18 | Dorothy Fitzpatrick | 24 | Wife | — | Massachusetts |
| 19 | Carolyn Fitzpatrick | 3 | Daughter | — | Massachusetts |
| 20 | John Tierney | 56 | Head | — | Irish Free State |
| 21 | Mary Tierney | 50 | Wife | — | Scotland |
| 22 | Margaret Tierney | 19 | Daughter | Typist | Massachusetts |
| 23 | Dorothy Tierney | 17 | Daughter | Finisher | Massachusetts |
| 24 | John Tierney THIS PERSON | 16 | Son | — | Massachusetts |
| 25 | Helen Tierney | 14 | Daughter | — | Massachusetts |
| 26 | George Tierney | 11 | Son | — | Massachusetts |
| 27 | James Carter | 55 | Head | Truck Driver | Irish Free State |
| 28 | Mary Carter | 52 | Wife | — | Irish Free State |
| 29 | James P. Carter | 26 | Son | Truck Driver Helper | Massachusetts |
| 30 | Joseph Carter | 12 | Son | — | Massachusetts |
| 31 | George E. Barry | 59 | Head | Plasterer | Massachusetts |
| 32 | Mary T. Barry | 42 | Wife | — | Irish Free State |
| 33 | Leo F. Barry | 19 | Son | Filler Maker'S Helper | Massachusetts |
| 34 | Alice Barry | 41 | Sister | — | Massachusetts |
| 35 | John Mulholland | 32 | Head | Nightwatchman | Massachusetts |
| 36 | Eileen Mulholland | 35 | Wife | — | Irish Free State |
| 37 | Eileen Mulholland | 2 | Daughter | — | Massachusetts |
| 38 | Anne Mulholland | 1 | Daughter | — | Massachusetts |
| 39 | Sophie H. Hilly | 62 | Head | — | Finland |
| 40 | William Hilly | 28 | Son | Inspector | Massachusetts |
Related Census Records
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)