MC
Mary Conley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Conley across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 10-person household.
Age 14
b. ~1926
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Conley |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston |
| Est. Birth Year | ~1926 |
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 |
|---|---|---|---|---|
| Mary Conley | Daughter | — | 14 | ~1926 |
| Ann Conley | Daughter | — | 5 | ~1935 |
| Francis Conley | Son | — | 12 | ~1928 |
| Mary Conley | Spouse | — | 42 | ~1898 |
| Thomas Nee | Other | — | 29 | ~1911 |
| Joseph Conley | Son | — | 15 | ~1925 |
| Peter Conley | Head | — | 45 | ~1895 |
| John Conley | Son | — | 10 | ~1930 |
| James Conley | Son | — | 4 | ~1936 |
| Bridget Conley | Other | — | 72 | ~1868 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 3
Suffolk, Massachusetts · implied b. ~1927 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conley |
| Given Name | Margaret A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| 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
Daughter, age 14
Suffolk-County, Massachusetts · implied b. ~1926 — 10 household members
| Surname | Conley |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Highest Grade | No 8 |
| 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 Conley across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Conley
Daughter · 1940 · age 14 · b. ~1926 · Massachusetts
★ You are viewing this record
Sibling
James Conley
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Conley
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Conley
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Conley
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Conley
Sibling · 1940 · age 15
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-t0627-01665-00220)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph Cummings | 27 | son | Assembler | Massachusetts |
| 42 | John Cummings | 25 | son | Assembler | Massachusetts |
| 43 | Frances Cummings | 22 | Daughter | Stenographer | Massachusetts |
| 44 | Edward Cummings | 16 | son | — | Massachusetts |
| 45 | Mary Dusey | 24 | Ledger | Buffer | Massachusetts |
| 46 | Peter F Conley | 45 | Head | Oil Man | Massachusetts |
| 47 | Mary Conley | 42 | Wife | — | Massachusetts |
| 48 | Joseph Conley | 15 | son | — | Massachusetts |
| 49 | Mary Conley THIS PERSON | 14 | Daughter | — | Massachusetts |
| 50 | Francis Conley | 12 | son | — | Massachusetts |
| 51 | John Conley | 10 | son | — | Massachusetts |
| 52 | Ann Conley | 5 | Daughter | — | Massachusetts |
| 53 | James Conley | 4 | son | — | Massachusetts |
| 54 | Bridget Conley | 72 | Mother | Office Cleaner | Eire |
| 55 | Thomas Nee | 29 | Brother in Law | Stringer | Massachusetts |
| 56 | Stephen Flaherty | 56 | Head | Car Packer | Eire |
| 57 | Della Flaherty | 51 | Wife | — | Massachusetts |
| 58 | John Flaherty | 14 | son | New Worker | Massachusetts |
| 59 | Anna Flaherty | 14 | Daughter | — | Massachusetts |
| 60 | Walter Brennan | 56 | Head | Laborer | Newfoundland |
| 61 | Elsie Brennan | 42 | Wife | — | Newfoundland |
| 62 | John Brennan | 23 | son | Roofer | Canada English |
| 63 | Mildred Brennan | 22 | Daughter | Brush Maker | Canada English |
| 64 | Gertrude Brennan | 20 | Daughter | Solderer | Canada English |
| 65 | Christine Brennan | 18 | Daughter | New Worker | Canada English |
| 66 | Paul Brennan | 15 | son | — | Massachusetts |
| 67 | Marjorie Brennan | 12 | Daughter | — | Massachusetts |
| 68 | Winifred Brennan | 10 | Daughter | — | Massachusetts |
| 69 | Joan Brennan | 7 | Daughter | — | Massachusetts |
| 70 | Rosemary Brennan | 5 | Daughter | — | Massachusetts |
| 71 | William Murray | 62 | Head | Fish Handler | Newfoundland |
| 72 | Bridget Murray | 52 | Wife | — | Newfoundland |
| 73 | William Murray | 23 | son | Bookkeeper | Massachusetts |
| 74 | Margaret Murray | 22 | Daughter | Buffer | Massachusetts |
| 75 | Harold Murray | 21 | son | Salesman | Massachusetts |
| 76 | Catherine Murray | 17 | Daughter | Examiner | Massachusetts |
| 77 | Gerald Murray | 16 | son | Teachers Assistant | Massachusetts |
| 78 | John Murray | 15 | son | — | Massachusetts |
| 79 | George Murray | 13 | son | — | Massachusetts |
| 80 | Dorothy Murray | 11 | Daughter | — | 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)