MC
Mary Crowley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Plymouth-County, Massachusetts
Our Model Tree links this Mary Crowley across the 1930 and 1940 US Censuses in Plymouth-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 7-person household.
Age 11
b. ~1929
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Plymouth-County, Massachusetts |
| Surname | Crowley |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Brockton City |
| 1935 Residence (County) | Plymouth |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Brockton City |
| Est. Birth Year | ~1929 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Margaret Crowley | Daughter | — | 5 | ~1935 |
| Nora Crowley | Spouse | — | 38 | ~1902 |
| Mary Crowley | Daughter | — | 11 | ~1929 |
| Noreen Crowley | Daughter | — | 1 | ~1939 |
| Edward Crowley | Son | — | 5 | ~1935 |
| Donald Crowley | Son | — | 8 | ~1932 |
| Patrick Crowley | Head | — | 40 | ~1900 |
Census Appearances
1930
Plymouth, Massachusetts
Daughter, age 1
Plymouth, Massachusetts · implied b. ~1929 — 4 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 | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Irish Free State |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Plymouth-County, Massachusetts
Daughter, age 11
Plymouth-County, Massachusetts · implied b. ~1929 — 7 household members
| Surname | Crowley |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Brockton City |
| 1935 Residence (County) | Plymouth |
| Highest Grade | No 6 |
| 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 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 11 · b. ~1929 · Massachusetts
★ You are viewing this record
Sibling
Margaret Crowley
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Noreen Crowley
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Crowley
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Crowley
Sibling · 1940 · age 8
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 — Plymouth-County, Massachusetts
Open full size
1940 US Federal Census — Plymouth-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01635-00775)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Henry E. Andrews | 23 | Son-in-law | Leveler | Massachusetts |
| 42 | Mary E. Andrews | 22 | Daughter | — | Massachusetts |
| 43 | Judith Ann Andrews | 0 | Granddaughter | — | Massachusetts |
| 44 | John Massone | 54 | Head | Retail Vegetable Market | Italy |
| 45 | Cassie M. Williams | 47 | Head | — | Maine |
| 46 | Dorothy K. Williams | 25 | Daughter | Stenographer | Maine |
| 47 | Charles R. Tibbetts | 65 | Lodger | — | Maine |
| 48 | Peter J. Mccraven | 49 | Head | Laborer | Eire |
| 49 | Margaret Mccraven | 49 | Wife | — | Eire |
| 50 | Catherine Mccraven | 17 | Daughter | — | Massachusetts |
| 51 | Frank Zachimia | 46 | Head | Heel Builders | Italy |
| 52 | Mary C. Zachimia | 40 | Wife | Stitching | Italy |
| 53 | Mary J. Zachimia | 20 | Daughter | Inspector | Pennsylvania |
| 54 | Vincent J. Zachimia | 13 | Son | — | Pennsylvania |
| 55 | Loretta Zachimia | 9 | Daughter | — | Pennsylvania |
| 56 | Ottavio Narcisi | 59 | Head | Musician | Italy |
| 57 | Lena Narcisi | 42 | Wife | — | Italy |
| 58 | Fernando Narcisi | 18 | Son | — | Massachusetts |
| 59 | Patrick J. Crowley | 40 | Head | Mechanic | Massachusetts |
| 60 | Nora B. Crowley | 38 | Wife | — | Eire |
| 61 | Mary C. Crowley THIS PERSON | 11 | Daughter | — | Massachusetts |
| 62 | Donald P. Crowley | 8 | Son | — | Massachusetts |
| 63 | Edward J. Crowley | 5 | Son | — | Massachusetts |
| 64 | Margaret Crowley | 5 | Daughter | — | Massachusetts |
| 65 | Noreen J. Crowley | 1 | Daughter | — | Massachusetts |
| 66 | Philip Mcgreen | 23 | Head | Postal Clerk | Eire |
| 67 | Eileen Mcgreen | 47 | Wife | — | Eire |
| 68 | Mary J. Mcgreen | 8 | Daughter | — | Massachusetts |
| 69 | Kathleen Mcgreen | 5 | Daughter | — | Massachusetts |
| 70 | Louis C. Moreau | 82 | Head | — | Massachusetts |
| 71 | Marie R. Moreau | 78 | Wife | — | Canada French |
| 72 | Victor L. Moreau | 46 | Son | Laborer | Massachusetts |
| 73 | Maude Jarvis | 61 | Partner | Teacher | Massachusetts |
| 74 | Eva C. Shannon | 39 | Partner | Teacher | England |
| 75 | Leroy Peck | 62 | Head | Carpenter | Vermont |
| 76 | Nora A. Peck | 54 | Wife | — | Massachusetts |
| 77 | Francis J. Flye | 62 | Head | Shoe Worker | Massachusetts |
| 78 | Helen L. Flye | 30 | Daughter | Teacher | Massachusetts |
| 79 | William F. Flye | 27 | Son | Road Worker | Massachusetts |
| 80 | Helen E. Welsh | 59 | Law | Shoe Worker | 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)