JC
John Crowley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Crowley across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 10-person household.
Age 23
b. ~1917
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Crowley |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Porter |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 892 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Porter |
| Township / Ward | Boston City |
| 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 John | Age | Birth yr |
|---|---|---|---|---|
| Thomas Crowley | Son | — | 12 | ~1928 |
| Mary Crowley | Daughter | — | 20 | ~1920 |
| Helen Crowley | Daughter | — | 16 | ~1924 |
| Marguerite Crowley | Daughter | — | 10 | ~1930 |
| Bridget Crowley | Spouse | — | 48 | ~1892 |
| James Crowley | Son | — | 3 | ~1937 |
| Francis Crowley | Son | — | 5 | ~1935 |
| Teresa Crowley | Daughter | — | 14 | ~1926 |
| John Crowley | Son | — | 23 | ~1917 |
| John Crowley | Head | — | 55 | ~1885 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 12
Suffolk, Massachusetts · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crowley |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 23
Suffolk-County, Massachusetts · implied b. ~1917 — 10 household members
| Surname | Crowley |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Porter |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 892 |
| Highest Grade | C 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 Crowley across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Crowley
Son · 1940 · age 23 · b. ~1917 · Massachusetts
★ You are viewing this record
Sibling
Helen Crowley
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marguerite Crowley
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Crowley
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Crowley
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Crowley
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Teresa Crowley
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Crowley
Sibling · 1940 · age 3
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-t0627-01669-00389)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Crowley | 27 | Daughter | Stenographer | Massachusetts |
| 2 | John Crowley | 55 | Head | Operator | Eire |
| 3 | Bridget Crowley | 48 | Wife | — | Eire |
| 4 | John J. Crowley THIS PERSON | 23 | Son | Porter | Massachusetts |
| 5 | Mary J. Crowley | 20 | Daughter | Machine Operator | Massachusetts |
| 6 | Helen Crowley | 16 | Daughter | — | Massachusetts |
| 7 | Teresa Crowley | 14 | Daughter | — | Massachusetts |
| 8 | Thomas Crowley | 12 | Son | — | Massachusetts |
| 9 | Marguerite Crowley | 10 | Daughter | — | Massachusetts |
| 10 | Francis Crowley | 5 | Son | — | Massachusetts |
| 11 | James M. Crowley | 3 | Son | — | Massachusetts |
| 12 | Joseph Finigan | 38 | Head | Salesman | Massachusetts |
| 13 | Margaret M. Finigan | 61 | Mother | — | Eire |
| 14 | John J. Finigan | 26 | Brother | — | Eire |
| 15 | Genevieve Finigan | 16 | Sister | — | Massachusetts |
| 16 | John M. Finigan | 29 | Brother | Shipper | Massachusetts |
| 17 | Harvey Gray | 43 | Brother in law | Truck Driver | Maine |
| 18 | Mary M. Gray | 35 | Sister | Stenographer | Massachusetts |
| 19 | Mary Gray | 12 | Niece | — | Massachusetts |
| 20 | Harvey Jr. Gray | 7 | Nephew | — | Maine |
| 21 | John Gray | 4 | Nephew | — | Maine |
| 22 | James D. Regan | 48 | Head | Tree Surgeon | Massachusetts |
| 23 | Helen Regan | 57 | Wife | — | England |
| 24 | Edwin F. Doherty | 23 | Step son | Waiter | Massachusetts |
| 25 | Edith G. Doherty | 21 | Step daughter | Salesman | Massachusetts |
| 26 | Alice M. Doherty | 20 | Step daughter | Bank Clerk | Massachusetts |
| 27 | Robert J. Doherty | 18 | Step son | Chauffeur | Massachusetts |
| 28 | James B. Halligan | 53 | Head | Laborer Wpa | Massachusetts |
| 29 | Catherine Halligan | 53 | Wife | — | Massachusetts |
| 30 | Rita G. Halligan | 19 | Daughter | Packer | Massachusetts |
| 31 | Alice Halligan | 16 | Daughter | — | Massachusetts |
| 32 | John Halligan | 14 | Son | — | Massachusetts |
| 33 | Mary Halligan | 11 | Daughter | — | Massachusetts |
| 34 | Catherine Halligan | 10 | Daughter | — | Massachusetts |
| 35 | Mary E. Halligan | 82 | Mother | — | Massachusetts |
| 36 | William E. Leland | 64 | Head | Salesman | Massachusetts |
| 37 | Mae N. Leland | 64 | Wife | Buyer | Massachusetts |
| 38 | Peter Kennedy | 74 | Head | — | Eire |
| 39 | Elizabeth Kennedy | 46 | Daughter | — | Massachusetts |
| 40 | Helen Kennedy | 40 | Daughter | Operator | 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)