JC
John Coughlin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Coughlin across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 6-person household.
Age 11
b. ~1929
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Coughlin |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | S-5 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Coughlin | Son | — | 11 | ~1929 |
| Lawrence Coughlin | Son | — | 19 | ~1921 |
| Anne Coughlin | Daughter | — | 17 | ~1923 |
| Kathleen Coughlin | Daughter | — | 7 | ~1933 |
| James Coughlin | Head | — | 50 | ~1890 |
| Louise Coughlin | Spouse | — | 47 | ~1893 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 2
Suffolk, Massachusetts · implied b. ~1928 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coughlan |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| 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
Son, age 11
Suffolk-County, Massachusetts · implied b. ~1929 — 6 household members
| Surname | Coughlin |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Highest Grade | S-5 |
| 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 Coughlin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Coughlin
Son · 1940 · age 11 · b. ~1929 · Massachusetts
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Sibling
Lawrence Coughlin
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Coughlin
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Coughlin
Sibling · 1940 · age 17
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-t0627-01679-00295)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annie Reidy | 45 | Sister | Stenographer | Eire |
| 42 | Margaret O'Connell | 58 | Head | Collar Shaper | Eire |
| 43 | Catherine R. Shields | 57 | Sister | — | Eire |
| 44 | August Hauffler | 52 | Head | Heating & Air | Germany |
| 45 | Minnie Hauffler | 51 | Wife | — | Germany |
| 46 | Robert E. Hauffler | 22 | Son | — | Germany |
| 47 | Edward A. Lord | 41 | Head | Salesman | Conn. |
| 48 | Mary K. Lord | 41 | Wife | — | Vermont |
| 49 | Bruce Lord | 15 | Son | — | Vermont |
| 50 | Martin J. Burns | 60 | Head | Stock Man | Eire |
| 51 | Annie Burns | 60 | Wife | — | Eire |
| 52 | Margaret E. Burns | 29 | Dau | Clerk - File | Massachusetts |
| 53 | James J. Coughlin | 50 | Head | Police | Eire |
| 54 | Louise Coughlin | 47 | Wife | — | Eire |
| 55 | Lawrence J. Coughlin | 19 | Son | Student None | Massachusetts |
| 56 | Anne M. Coughlin | 17 | Daughter | Student None | Massachusetts |
| 57 | John J. Coughlin THIS PERSON | 11 | Son | — | Massachusetts |
| 58 | Kathleen L. Coughlin | 7 | Daughter | — | Massachusetts |
| 59 | John D. Broderick | 45 | Head | Meat Cutter | Massachusetts |
| 60 | Mary A. Broderick | 45 | Wife | — | Eire |
| 61 | Edna Broderick | 49 | Sister | Foreman Room | Massachusetts |
| 62 | Cornelius Buckley | 75 | Father Law | — | Eire |
| 63 | Mary E. Fallon | 57 | Head | — | Massachusetts |
| 64 | Eleanor Fallon | 32 | Daughter | Teacher | Massachusetts |
| 65 | Catherine Fallon | 29 | Daughter | Teacher | Massachusetts |
| 66 | Frances Fallon | 28 | Daughter | Nurse | Massachusetts |
| 67 | Mary Fallon | 26 | Daughter | Stenographer | Massachusetts |
| 68 | Lawrence Fallon | 24 | Son | Student None | Massachusetts |
| 69 | Anne Fallon | 22 | Daughter | — | Massachusetts |
| 70 | Mary John Fallon | 55 | Sister | Helper | Massachusetts |
| 71 | Martha Macpherson | 84 | Head | — | England |
| 72 | Constance Macpherson | 52 | Daughter | Dressmaker | Massachusetts |
| 73 | Ada Macpherson | 49 | Daughter | Dressmaker | Massachusetts |
| 74 | Mary Macpherson | 44 | Daughter | Hats | Massachusetts |
| 75 | Ernest A. Hembey | 63 | Head | — | Germany |
| 76 | Eva E. Hembey | 63 | Wife | — | Massachusetts |
| 77 | Greta A. Hembey | 36 | Daughter | Secretary | Massachusetts |
| 78 | Gladys P. Hembey | 32 | Daughter | Clerk - File | Massachusetts |
| 79 | Doris A. Hembey | 24 | Daughter | — | Massachusetts |
| 80 | Cornelia Kenney | 46 | Head | Nurse | 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)