MC
Mary Crowley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Crowley across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 10-person household.
Age 23
b. ~1917
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Crowley |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Cashier |
| Industry | Department Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 780 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Cashier |
| Township / Ward | Boston |
| Est. Birth Year | ~1917 |
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 |
|---|---|---|---|---|
| John Donahue | Other | — | 42 | ~1898 |
| Nora Crowley | Daughter | — | 22 | ~1918 |
| Anna Lavast | Other | — | 24 | ~1916 |
| Josephine O'Connor | Other | — | 65 | ~1875 |
| Mary Crowley | Daughter | — | 23 | ~1917 |
| Mary Crowley | Spouse | — | 52 | ~1888 |
| Lawrence Crowley | Head | — | 52 | ~1888 |
| Joseph Kendrigan | Other | — | 62 | ~1878 |
| Eileen Crowley | Daughter | — | 17 | ~1923 |
| Margaret Crowley | Daughter | — | 20 | ~1920 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 14
Suffolk, Massachusetts · implied b. ~1916 — 15 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crowley |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 23
Suffolk-County, Massachusetts · implied b. ~1917 — 10 household members
| Surname | Crowley |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Cashier |
| Industry | Department Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 780 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| 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 Crowley across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Crowley
Daughter · 1940 · age 23 · b. ~1917 · Massachusetts
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Sibling
Eileen Crowley
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Crowley
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nora Crowley
Sibling · 1940 · age 22
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-t0627-01662-00020)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Carl Klein | 39 | Lodger | Musician | Germany |
| 42 | Elsbeth Albrecht | 21 | Lodger | Entertainer | Germany |
| 43 | Joseph Macfadan | 50 | Lodger | Furniture Repair | Missouri |
| 44 | Agnes Pauliner | 43 | Lodger | — | Massachusetts |
| 45 | Rose G. Pauliner | 5 | Daughter | — | Massachusetts |
| 46 | Anna Cole | 69 | Head | House Keeper | England |
| 47 | Jerry Roach | 48 | Lodger | — | New Hampshire |
| 48 | Emma Romkey | 75 | Lodger | Domestic | Nova Scotia |
| 49 | Charles M. Moore | 40 | Lodger | Salesman | Ohio |
| 50 | Sarah K. Reese | 29 | Lodger | — | Michigan |
| 51 | John Macintyre | 43 | Lodger | — | Massachusetts |
| 52 | Arthur J. Deeks | 66 | Lodger | — | Massachusetts |
| 53 | Ralph K. Chase | 27 | Lodger | Cook | Maine |
| 54 | Raymond Dyer | 21 | Lodger | Pin Boy | Maine |
| 55 | Charles C. Ducann | 61 | Head | Chef | England |
| 56 | Harriet Ducann | 58 | Wife | House Keeper | England |
| 57 | Patrick A'Hearn | 45 | Lodger | Chauffeur | Irish Free State |
| 58 | Mary Murphy | 39 | Lodger | Employee | Irish Free State |
| 59 | James Dunnett | 35 | Lodger | Packaging Seeds | Scotland |
| 60 | George Durman | 46 | Lodger | Butler | England |
| 61 | Jeanette Provencer | 30 | Lodger | Nurse | Canada |
| 62 | Olive Dragon | 35 | Lodger | Domestic | Massachusetts |
| 63 | George Middleton | 21 | Lodger | — | Massachusetts |
| 64 | Ella Gaffney | 62 | Head | House Keeper | Irish Free State |
| 65 | Elizabeth Richie | 58 | Lodger | Ward Maid | Scotland |
| 66 | Agnes L. Dunlap | 60 | Lodger | Librarian | Maine |
| 67 | Mary Doherty | 59 | Lodger | Pantry Maid | Irish Free State |
| 68 | Samuel W. Powers | 36 | Lodger | Classified Laborer | Massachusetts |
| 69 | Nora Buckley | 80 | Lodger | — | Irish Free State |
| 70 | John L. Kelly | 36 | Lodger | Clerical | Rhode Island |
| 71 | Lawrence Crowley | 52 | Head | Stationary Engineer | Irish Free State |
| 72 | Mary E. Crowley | 52 | Wife | House Keeper | Irish Free State |
| 73 | Mary C. Crowley THIS PERSON | 23 | Daughter | Cashier | Massachusetts |
| 74 | Nora F. Crowley | 22 | Daughter | Typist | Massachusetts |
| 75 | Margaret A. Crowley | 20 | Daughter | Salesgirl | Massachusetts |
| 76 | Eileen F. Crowley | 17 | Daughter | New Worker | Massachusetts |
| 77 | John Donahue | 42 | Lodger | Linen Room Feeder | Irish Free State |
| 78 | Anna Lavast | 24 | Lodger | — | Sweden |
| 79 | Joseph Kendrigan | 62 | Lodger | House Man | Irish Free State |
| 80 | Josephine O'Connor | 65 | Lodger | Dressmaker | New York |
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)