JQ
John Quinn — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Quinn across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Timothy & Mary — first a head (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Quinn |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Laborer |
| Industry | W.P.A. Water Mains project |
| Class of Worker | GW |
| Hours Worked | 146 |
| Income (1939) | 675 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Laborer |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1914 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Quinn | Head | — | 26 | ~1914 |
| John Quinn | Son | — | 2 | ~1938 |
| Gertrude Quinn | Spouse | — | 24 | ~1916 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 3
Middlesex, Massachusetts · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Quinn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 15
Middlesex, Massachusetts · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Quinn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 26
Middlesex-County, Massachusetts · implied b. ~1914 — 3 household members
| Surname | Quinn |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Occupation | Laborer |
| Industry | W.P.A. Water Mains project |
| Class of Worker | GW |
| Hours Worked | 146 |
| Income (1939) | 675 |
| Highest Grade | No 8 |
| 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 Quinn across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Timothy Quinn (~0.92 confidence) and mother Mary Quinn (~0.92 confidence) and mother Mary Quinn (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Timothy Quinn
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Mary Quinn
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Mary Quinn
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Quinn
Head · 1940 · age 26 · b. ~1914 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01702-00618)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Albert Barry | 32 | Nephew | Printer | Massachusetts |
| 42 | Gertrude Barry | 29 | Niece | Cook | Massachusetts |
| 43 | John Barry | 28 | Nephew | Packer | Massachusetts |
| 44 | Catherine Barry | 26 | Niece | Seamstress | Massachusetts |
| 45 | James C. Johnson | 50 | Head | Laborer | Massachusetts |
| 46 | Anna Johnson | 59 | Wife | — | Scotland |
| 47 | Lena Johnson | 20 | Daughter | New Worker | Massachusetts |
| 48 | Jacob Beher | 68 | Head | Shoe-Repair | Russia |
| 49 | Mary Beher | 68 | Wife | — | Russia |
| 50 | Joseph O'Brien | 49 | Head | Chauffeur | Massachusetts |
| 51 | Caroline O'Brien | 44 | Wife | — | Massachusetts |
| 52 | William O'Brien | 24 | Son | Shipper | Massachusetts |
| 53 | Dorothea O'Brien | 22 | Daughter | Waitress | Massachusetts |
| 54 | Joseph O'Brien | 20 | Son | New Worker | Massachusetts |
| 55 | Rita O'Brien | 15 | Daughter | — | Massachusetts |
| 56 | John O'Brien | 11 | Son | — | Massachusetts |
| 57 | Eugene O'Brien | 9 | Son | — | Massachusetts |
| 58 | Marguerite O'Brien | 6 | Daughter | — | Massachusetts |
| 59 | Timothy Knightly | 42 | Head | Laborer | Eire |
| 60 | Nellie Knightly | 38 | Wife | — | Eire |
| 61 | William Knightly | 14 | Son | — | Massachusetts |
| 62 | Anabal Medeiros | 39 | Head | Laborer | Portugal |
| 63 | Mary Medeiros | 70 | Mother | — | Portugal |
| 64 | Mary Holcom | 37 | Head | Waitress | Massachusetts |
| 65 | Jacqueline Holcom | 14 | Daughter | — | Massachusetts |
| 66 | John Quinn THIS PERSON | 26 | Head | Laborer | Massachusetts |
| 67 | Gertrude Quinn | 24 | Wife | — | Massachusetts |
| 68 | John Quinn | 2 | Son | — | Massachusetts |
| 69 | Frederick Mckeown | 30 | Head | Laborer | Massachusetts |
| 70 | Annie Mckeown | 29 | Wife | — | Massachusetts |
| 71 | Frederick Mckeown | 8 | Son | — | Massachusetts |
| 72 | Barry Mckeown | 6 | Son | — | Massachusetts |
| 73 | Diane Mckeown | 4 | Daughter | — | Massachusetts |
| 74 | William Grady | 32 | Head | Chauffeur | Massachusetts |
| 75 | Mary Grady | 34 | Wife | — | Massachusetts |
| 76 | Thomas Grady | 8 | Son | — | Massachusetts |
| 77 | William Grady | 7 | Son | — | Massachusetts |
| 78 | William Beau | 51 | Head | Laborer | Canada-English |
| 79 | Alice Beau | 43 | Wife | — | Massachusetts |
| 80 | Agnes Beau | 18 | Daughter | — | Massachusetts |
Pedigree Summary
John
Gen 1 · 3 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)