JC
John Cronin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Cronin across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Matthew & Michael — first a son (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Cronin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Cabinet Maker |
| Industry | Furniture Store |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | H-2 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Cabinetmaker |
| Township / Ward | Boston |
| Est. Birth Year | ~1915 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Cronin | Son | — | 25 | ~1915 |
| Eleanor Cronin | Daughter | — | 21 | ~1919 |
| Michael Cronin | Head | — | 59 | ~1881 |
| Clara Cronin | Spouse | — | 57 | ~1883 |
| Catherine Cronin | Daughter | — | 24 | ~1916 |
| Joseph Cronin | Son | — | 27 | ~1913 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 6
Suffolk, Massachusetts · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cronin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 16
Suffolk, Massachusetts · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cronin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 25
Suffolk-County, Massachusetts · implied b. ~1915 — 6 household members
| Surname | Cronin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Cabinet Maker |
| Industry | Furniture Store |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | H-2 |
| 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 John Cronin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Matthew Cronin (~0.92 confidence) and father Michael Cronin (~0.92 confidence) and mother Bridget Cronin (~0.92 confidence) and mother Clara Cronin (~0.92 confidence) and mother Hannah Cronin (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Matthew Cronin
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Michael Cronin
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Bridget Cronin
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Clara Cronin
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Hannah Cronin
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Cronin
Son · 1940 · age 25 · b. ~1915 · Massachusetts
★ You are viewing this record
Sibling
Catherine Cronin
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Cronin
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Cronin
Sibling · 1940 · age 21
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-t0627-01674-00694)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ellen Dugan | 61 | Sister | Companion | Ireland |
| 42 | Nellie Hennessey | 60 | Head | — | Ireland |
| 43 | Frank B. Hennessey | 34 | Son | Auditor | Massachusetts |
| 44 | James Hennessey | 27 | Son | Laborer | Massachusetts |
| 45 | Extra Hennessey | None | LINE | — | — |
| 46 | Extra Hennessey | None | LINE | — | — |
| 47 | Michael Cronin | 59 | Head | Int. Dec. | Ireland |
| 48 | Clara Cronin | 57 | Wife | — | Massachusetts |
| 49 | Joseph Cronin | 27 | Son | Int. Dec. | Massachusetts |
| 50 | Catherine Cronin | 24 | Daughter | Salesgirl | Massachusetts |
| 51 | John Cronin THIS PERSON | 25 | Son | Cabinet Maker | Massachusetts |
| 52 | Eleanor Cronin | 21 | Daughter | Salesgirl | Massachusetts |
| 53 | John Lynch | 48 | Head | Painter | Newfoundland |
| 54 | Frances Lynch | 45 | Wife | — | Massachusetts |
| 55 | John Stewart | 40 | Head | Painter | Massachusetts |
| 56 | Helen Stewart | 35 | Wife | — | Massachusetts |
| 57 | Joseph M. Shields | 55 | Head | Trainman | Massachusetts |
| 58 | Mary E. Shields | 46 | Wife | — | Massachusetts |
| 59 | Elizabeth Shields | 21 | Daughter | New Worker | Massachusetts |
| 60 | Mary C. Shields | 16 | Daughter | New Worker | Massachusetts |
| 61 | Agnes Shields | 15 | Daughter | — | Massachusetts |
| 62 | Edward Shields | 12 | Son | — | Massachusetts |
| 63 | Neil Mcneil | 31 | Head | Laborer | Massachusetts |
| 64 | Helen Mcneil | 27 | Wife | — | Massachusetts |
| 65 | Edith Mcneil | 3 | Daughter | — | Massachusetts |
| 66 | William J. Mcneil | 0 | Son | — | Massachusetts |
| 67 | George Corbett | 53 | Head | — | N. Ireland |
| 68 | Philip Corbett | 19 | Son | Truck Driver | Massachusetts |
| 69 | John Corbett | 18 | Son | New Worker | Massachusetts |
| 70 | Edward Corbett | 16 | Son | — | Massachusetts |
| 71 | James Corbett | 15 | Son | — | Massachusetts |
| 72 | Margaret Corbett | 13 | Daughter | — | Massachusetts |
| 73 | Joseph Perry | 52 | Head | Laborer | N. Ireland |
| 74 | Margaret Perry | 51 | Wife | — | N. Ireland |
| 75 | John Perry | 17 | Son | — | Massachusetts |
| 76 | Charles Perry | 15 | Son | — | Massachusetts |
| 77 | Mary Calala | 42 | Head | — | Massachusetts |
| 78 | Anne Calala | 17 | Daughter | — | Massachusetts |
| 79 | Albert Calala | 11 | Son | — | Massachusetts |
| 80 | Jean Calala | 10 | Daughter | — | Massachusetts |
Pedigree Summary
John + 3 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)