JF
John Fitzpatrick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Fitzpatrick across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 10-person household.
Age 18
b. ~1922
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Fitzpatrick |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1922 |
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 |
|---|---|---|---|---|
| Marie Fitzpatrick | Daughter | — | 21 | ~1919 |
| Irene Fitzpatrick | Daughter | — | 15 | ~1925 |
| Carolyn Fitzpatrick | Daughter | — | 20 | ~1920 |
| Lucy Fitzpatrick | Daughter | — | 18 | ~1922 |
| Claire Fitzpatrick | Daughter | — | 12 | ~1928 |
| Eleanor Fitzpatrick | Daughter | — | 14 | ~1926 |
| Joseph Fitzpatrick | Head | — | 53 | ~1887 |
| John Fitzpatrick | Son | — | 18 | ~1922 |
| Joseph Fitzpatrick | Son | — | 19 | ~1921 |
| Joanna Fitzpatrick | Spouse | — | 50 | ~1890 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 7
Suffolk, Massachusetts · implied b. ~1923 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzpatrick |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| 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 18
Suffolk-County, Massachusetts · implied b. ~1922 — 10 household members
| Surname | Fitzpatrick |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Income (1939) | 0 |
| Highest Grade | Hs 3 |
| 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 Fitzpatrick across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Fitzpatrick
Son · 1940 · age 18 · b. ~1922 · Massachusetts
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Sibling
Joseph Fitzpatrick
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Fitzpatrick
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Claire Fitzpatrick
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucy Fitzpatrick
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carolyn Fitzpatrick
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Fitzpatrick
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Fitzpatrick
Sibling · 1940 · age 14
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-t0627-01657-00276)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Abigail Hogan | 73 | Head | — | Massachusetts |
| 42 | Abigail Hogan | 40 | Daughter | Payroll Clerk | Massachusetts |
| 43 | Mary Hogan | 35 | Daughter | Operator | Massachusetts |
| 44 | John Rich | 70 | Head | Checker | Massachusetts |
| 45 | Peter Rich | 83 | Uncle | — | Germany |
| 46 | William Hamblett | 32 | Head | Shipper | Scotland |
| 47 | Alice Hamblett | 28 | Wife | — | England |
| 48 | William Hamblett | 14 | Son | — | Canada |
| 49 | Lillian Hamblett | 16 | Daughter | — | Canada |
| 50 | George E. Quinn | 62 | Head | — | Canada |
| 51 | Margaret Quinn | 32 | Wife | — | Massachusetts |
| 52 | George Quinn | 9 | Son | — | Massachusetts |
| 53 | Wilfred Lane | 27 | Head | Laborer | Massachusetts |
| 54 | Dorothy Lane | 23 | Wife | — | Massachusetts |
| 55 | Donald Lane | 5 | Son | — | Massachusetts |
| 56 | Joan Hazel Lane | 2 | Daughter | — | Massachusetts |
| 57 | Albert E. Smith | 60 | Head | Laborer | Maine |
| 58 | Alice M. Smith | 58 | Wife | — | Massachusetts |
| 59 | Allan Smith | 19 | Son | New Worker | Massachusetts |
| 60 | Harold E. Smith | 19 | Son | Cleaner | Massachusetts |
| 61 | Michael Harrison | 62 | Head | Shipper | Massachusetts |
| 62 | Michael F. Coughlin | 62 | Head | Engineer | Massachusetts |
| 63 | Catherine Coughlin | 62 | Wife | — | Massachusetts |
| 64 | Frank J. Coughlin | 40 | Son | Clerk | Massachusetts |
| 65 | Helen Coughlin | 37 | Daughter | — | Massachusetts |
| 66 | Mary H. Coughlin | 34 | Daughter | — | Massachusetts |
| 67 | Gertrude M. Gillespie | 22 | Daughter | Cashier | Massachusetts |
| 68 | Robert F. Gillespie | 12 | Grandson | — | Massachusetts |
| 69 | Joseph H. Fitzpatrick | 53 | Head | Owner | Massachusetts |
| 70 | Joanna L. Fitzpatrick | 50 | Wife | — | Massachusetts |
| 71 | Marie Fitzpatrick | 21 | Daughter | Stenographer | Massachusetts |
| 72 | Carolyn Fitzpatrick | 20 | Daughter | Stenographer | Massachusetts |
| 73 | Joseph Fitzpatrick | 19 | Son | New Worker | Massachusetts |
| 74 | Lucy Fitzpatrick | 18 | Daughter | Stenographer | Massachusetts |
| 75 | John Fitzpatrick THIS PERSON | 18 | Son | — | Massachusetts |
| 76 | Irene Fitzpatrick | 15 | Daughter | — | Massachusetts |
| 77 | Eleanor Fitzpatrick | 14 | Daughter | — | Massachusetts |
| 78 | Claire Fitzpatrick | 12 | Daughter | — | Massachusetts |
| 79 | Annie Joyce | 70 | Head | — | Canada |
| 80 | John F. Joyce | 43 | Son | Painter | 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)