JC
John Coffey — 1930 US Census Record
Model Tree available1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this John Coffey across the 1920, 1930 and 1940 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed), with identified parents James & Estelle — first a son (b.~1915), then head of a 5-person household.
Age 15
b. ~1915
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Coffey |
| Given Name | John C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| 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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| James Coffey | Head | — | 48 | ~1882 |
| John Coffey | Son | — | 15 | ~1915 |
| Eleanor Coffey | Daughter | — | 9 | ~1921 |
| James Coffey | Son | — | 12 | ~1918 |
| Gertrude Coffey | Other | — | 43 | ~1887 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 4
Suffolk, Massachusetts · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coffey |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| 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 |
1930
Suffolk, Massachusetts
Son, age 15
Suffolk, Massachusetts · implied b. ~1915 — 5 household members
| Surname | Coffey |
| Given Name | John C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| 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
Other, age 26
Suffolk-County, Massachusetts · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cuffey |
| Given Name | John |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Widowed |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Income (1939) | 0 |
| Highest Grade | No |
| 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 Coffey across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Coffey (~0.92 confidence) and mother Estelle Coffey (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Coffey
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Estelle Coffey
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Coffey
Son · 1930 · age 15 · b. ~1915 · Massachusetts
★ You are viewing this record
Sibling
James Coffey
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Coffey
Sibling · 1930 · age 9
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
1930 US Federal Census — Suffolk, Massachusetts
Open full size
1930 US Federal Census — Suffolk, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel957:0695)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James J. Black | 64 | Head | Builder | Canada-English |
| 2 | James J. Black | 27 | Son | Builder | Massachusetts |
| 3 | Helen B. Roache | 31 | Daughter | — | Massachusetts |
| 4 | Francis J. Dowd | 31 | Head | Assistant Treasurer | Massachusetts |
| 5 | Helen R. Dowd | 31 | Wife-H | — | Massachusetts |
| 6 | Gerald F. Dowd | 5 | Son | — | Massachusetts |
| 7 | Agnes Kelly Dowd | 68 | Mother | — | Massachusetts |
| 8 | Pauline A. Dowd | 30 | Sister | Stenographer | Massachusetts |
| 9 | James H. Coffey | 48 | Head | Clerk | Massachusetts |
| 10 | Gertrude G. Coffey | 43 | Wife-H | — | Massachusetts |
| 11 | John C. Coffey THIS PERSON | 15 | Son | — | Massachusetts |
| 12 | James H. Coffey | 12 | Son | — | Massachusetts |
| 13 | Eleanor Coffey | 9 | Daughter | — | Massachusetts |
| 14 | John R. Soley | 53 | Head | Broker | Massachusetts |
| 15 | Caroline R. Soley | 52 | Wife-H | — | Massachusetts |
| 16 | James H. Keltie | 79 | Head | — | Canada-English |
| 17 | Jean B. Keltie | 45 | Daughter | — | Canada-English |
| 18 | Kenneth Keltie | 41 | Son | Agent | Canada-English |
| 19 | Samuel D. Hamilton | 57 | Head | Decorator | Massachusetts |
| 20 | Charlotte R. Hamilton | 56 | Wife-H | — | Canada-English |
| 21 | Frank Reynolds | 39 | Head | Manager | Massachusetts |
| 22 | Mary H. Reynolds | 39 | Wife-H | — | Massachusetts |
| 23 | Barbara Reynolds | 5 | Daughter | — | Massachusetts |
| 24 | Jean Reynolds | 1 | Daughter | — | Massachusetts |
| 25 | James F. Keefe | 56 | Head | Manager | Massachusetts |
| 26 | Ellen E. Keefe | 54 | Wife-H | — | Massachusetts |
| 27 | Thomas E. Keefe | 25 | Son | Salesman | Massachusetts |
| 28 | Ellen Hegarty | 65 | Head-H | — | Vermont |
| 29 | Agnes Hegarty | 64 | Sister | — | Massachusetts |
| 30 | Elmer A. Deavitt | 40 | Head | Electrician | Massachusetts |
| 31 | Clara M. Deavitt | 68 | Mother-H | — | Massachusetts |
| 32 | Lester Parker | 54 | Head | Asst. Manager | Massachusetts |
| 33 | Martha Parker | 51 | Wife-H | — | Massachusetts |
| 34 | John E. Hobbs | 52 | Head | Superintendent | Scotland |
| 35 | Susan M. Hobbs | 47 | Wife-H | — | Massachusetts |
| 36 | Grayson G. Hobbs | 23 | Daughter | Stenographer | Massachusetts |
| 37 | James J. Delaney | 46 | Head | Salesman | Massachusetts |
| 38 | Frances A. Delaney | 40 | Wife-H | — | Massachusetts |
| 39 | Marie M. Delaney | 16 | Daughter | — | Massachusetts |
| 40 | James J. Delaney | 13 | Son | — | Massachusetts |
| 41 | Francis A. Delaney | 12 | Son | — | Massachusetts |
| 42 | Joseph P. Comerford | 38 | Head | Business | Massachusetts |
| 43 | Mabel E. Comerford | 38 | Wife-H | — | Canada-English |
| 44 | Joseph J. Comerford | 6 | Son | — | Massachusetts |
| 45 | Edward E. Comerford | 4 | Son | — | Massachusetts |
| 46 | Robert C. Comerford | 2 | Son | — | Massachusetts |
| 47 | Marion J. Comerford | 1 | Daughter | — | Massachusetts |
| 48 | Agnes M. Doyle | 40 | Sister-in-law | Saleslady | Canada-English |
| 49 | Rudolph G. Oehlsten | 61 | Head | Manufacturer | Germany |
| 50 | Clara Oehlsten | 64 | Wife-H | — | Germany |
Pedigree Summary
John + 2 siblings
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)