MC
Mary Cohen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Cohen across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1913), then head of a 10-person household.
Age 27
b. ~1913
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Cohen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | School teacher |
| Industry | Public school |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 500 |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Teacher |
| Township / Ward | Boston |
| Est. Birth Year | ~1913 |
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 |
|---|---|---|---|---|
| Catherine Cohen | Head | — | 53 | ~1887 |
| John Cohen | Son | — | 17 | ~1923 |
| Mary Cohen | Daughter | — | 27 | ~1913 |
| Katherine Cohen | Daughter | — | 26 | ~1914 |
| Alfred Cohen | Son | — | 11 | ~1929 |
| Eileen Cohen | Daughter | — | 18 | ~1922 |
| Julia Cohen | Daughter | — | 24 | ~1916 |
| Honora Cohen | Daughter | — | 24 | ~1916 |
| Matthew Cohen | Son | — | 21 | ~1919 |
| Virginia Cohen | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Suffolk, Massachusetts
Other, age 16
Suffolk, Massachusetts · implied b. ~1914 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cohen |
| Given Name | Mary |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 27
Suffolk-County, Massachusetts · implied b. ~1913 — 10 household members
| Surname | Cohen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | School teacher |
| Industry | Public school |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 500 |
| Highest Grade | C-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 Cohen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cohen
Daughter · 1940 · age 27 · b. ~1913 · Massachusetts
★ You are viewing this record
Sibling
Honora Cohen
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Cohen
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Matthew Cohen
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Cohen
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eileen Cohen
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Cohen
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Cohen
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Cohen
Sibling · 1940 · age 26
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-t0627-01674-00208)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John T. Byrnes | 20 | Son | Cashier | Massachusetts |
| 42 | Patricia C. Byrnes | 17 | Daughter | — | Massachusetts |
| 43 | Margaret Blessington | 70 | Aunt | — | Eire |
| 44 | Daniel J. Mahoney | 63 | Head | Cashier | Massachusetts |
| 45 | Helena Mahoney | 55 | Wife | Teacher | Massachusetts |
| 46 | Daniel J. Jr. Mahoney | 15 | Son | — | Massachusetts |
| 47 | Anne M. Mahoney | 7 | Daughter | — | Massachusetts |
| 48 | John J. Brown | 45 | Head | Fireman | Massachusetts |
| 49 | Kathryn Brown | 45 | Wife | — | Massachusetts |
| 50 | Richard Brown | 17 | Son | — | Massachusetts |
| 51 | Jeanne M. Brown | 14 | Daughter | — | Massachusetts |
| 52 | Susan J. Cushing | 76 | Head | — | Massachusetts |
| 53 | Richard P. Harmon | 26 | Lodger | Substitute Teacher | New York |
| 54 | Helena Hagerty | 49 | Housekeeper | Housekeeper | Eire |
| 55 | John J. Blake | 44 | Head | Policeman | Massachusetts |
| 56 | Catherine A. Blake | 43 | Wife | — | Massachusetts |
| 57 | Elizabeth A. Blake | 17 | Daughter | — | Massachusetts |
| 58 | John J. Blake | 16 | Son | — | Massachusetts |
| 59 | Daniel T. Blake | 9 | Son | — | Massachusetts |
| 60 | Catherine Cohen | 53 | Head | — | Eire |
| 61 | Mary Cohen THIS PERSON | 27 | Daughter | School Teacher | Massachusetts |
| 62 | Katherine Cohen | 26 | Daughter | Secretary | Massachusetts |
| 63 | Honora P. Cohen | 24 | Daughter | School Teacher | Massachusetts |
| 64 | Julia Cohen | 24 | Daughter | Dental Asst. | Massachusetts |
| 65 | Matthew Cohen | 21 | Son | Bartender | Massachusetts |
| 66 | Eileen Cohen | 18 | Daughter | — | Massachusetts |
| 67 | John Cohen | 17 | Son | — | Massachusetts |
| 68 | Virginia Cohen | 15 | Daughter | — | Massachusetts |
| 69 | Alfred Cohen | 11 | Son | — | Massachusetts |
| 70 | D. Stuart Pope | 60 | Head | Salesman | New Jersey |
| 71 | Caroline Pope | 62 | Wife | — | New York |
| 72 | Jane Settle | 53 | Head | Cooking Teacher | Canada English |
| 73 | Gertrude Piper | 50 | Lodger | Secretary | Massachusetts |
| 74 | Francis T. Russell | 57 | Head | Proprietor | Eire |
| 75 | Catherine Russell | 55 | Wife | — | Massachusetts |
| 76 | Francis T. Jr. Russell | 28 | Son | Salesman | Massachusetts |
| 77 | Paul Russell | 24 | Son | Shipper | Massachusetts |
| 78 | Catherine Russell | 18 | Daughter | Librarian | Massachusetts |
| 79 | Miriam A. Russell | 13 | Daughter | — | Massachusetts |
| 80 | Eleanor Russell | 11 | Daughter | — | 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)