JL
John Lucas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Lucas across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 9-person household.
Age 12
b. ~1928
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Lucas |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1928 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Helen Lucas | Daughter | — | 10 | ~1930 |
| Catherine Lucas | Daughter | — | 6 | ~1934 |
| Dorothy Lucas | Daughter | — | 9 | ~1931 |
| Edward Lucas | Head | — | 39 | ~1901 |
| Joseph Lucas | Son | — | 3 | ~1937 |
| Edward Lucas | Son | — | 14 | ~1926 |
| John Lucas | Son | — | 12 | ~1928 |
| James Lucas | Son | — | 8 | ~1932 |
| Catherine Lucas | Spouse | — | 31 | ~1909 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 1
Suffolk, Massachusetts · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucca |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Italy |
| Mother's Birthplace | Italy |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 12
Suffolk-County, Massachusetts · implied b. ~1928 — 9 household members
| Surname | Lucas |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Highest Grade | No 6 |
| 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 Lucas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Lucas
Son · 1940 · age 12 · b. ~1928 · Massachusetts
★ You are viewing this record
Sibling
James Lucas
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Lucas
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Lucas
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Lucas
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Lucas
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Lucas
Sibling · 1940 · age 3
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
39 people indexed on this census page (nara:1940:m-t0627-01659-00073)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Melchiore Benenate | 43 | Head | Laborer | Italy |
| 2 | Mary Benenate | 35 | Wife | Housekeeper | Massachusetts |
| 3 | Joseph Benenate | 15 | Son | — | Massachusetts |
| 4 | George E. Mulcahy | 45 | Head | Long Shore | Massachusetts |
| 5 | Rose A. Mulcahy | 45 | Wife | Housekeeper | Massachusetts |
| 6 | Edward Lucas | 39 | Head | Boiler Maker | Massachusetts |
| 7 | Catherine Lucas | 31 | Wife | Housekeeper | Massachusetts |
| 8 | Edward Lucas | 14 | Son | — | Massachusetts |
| 9 | John Lucas THIS PERSON | 12 | Son | — | Massachusetts |
| 10 | Joseph Lucas | 3 | Son | — | Massachusetts |
| 11 | James Lucas | 8 | Son | — | Massachusetts |
| 12 | Helen Lucas | 10 | Daughter | — | Massachusetts |
| 13 | Dorothy Lucas | 9 | Daughter | — | Massachusetts |
| 14 | Catherine Lucas | 6 | Daughter | — | Massachusetts |
| 15 | Sadie Chase | 57 | Head | Housework | Maine |
| 16 | Harry Ashland | 61 | Brother | Laborer | Maine |
| 17 | Alfred Chase | 22 | Son | Electrician | Massachusetts |
| 18 | Frederick Chase | 17 | Son | Coal Man | Massachusetts |
| 19 | Edward Chase | 18 | Son | Laborer | Massachusetts |
| 20 | Arthur Gardner | 26 | Head | Salesman | Massachusetts |
| 21 | Anna Gardner | 20 | Wife | Housekeeper | Massachusetts |
| 22 | Albert Gardner | 1 | Son | — | Massachusetts |
| 23 | Tere Stramberg | 25 | Lodger | Waiter | Sweden |
| 24 | Margaret O'Neil | 60 | Head | Matron | Ireland |
| 25 | Dorothy Otto | 29 | Neice | Saleslady | Massachusetts |
| 26 | Patrick Furey | 61 | Head | Laborer | Massachusetts |
| 27 | Dora Furey | 68 | Wife | Housekeeper | Ireland |
| 28 | William Hurley | 46 | Step Son | Sick | Massachusetts |
| 29 | John J. Hayes | 44 | Head | Laborer | Massachusetts |
| 30 | Irene Hayes | 44 | Wife | Housekeeper | Massachusetts |
| 31 | James Cavanaugh | 19 | Step Son | Long Shore | Massachusetts |
| 32 | Clement Doherty | 37 | Head | Transportation | Massachusetts |
| 33 | Emma Doherty | 36 | Wife | Housekeeper | Massachusetts |
| 34 | Rita Doherty | 17 | Daughter | — | Massachusetts |
| 35 | Emma Doherty | 15 | Daughter | — | Massachusetts |
| 36 | Elizabeth Doherty | 14 | Daughter | — | Massachusetts |
| 37 | Henery Doherty | 12 | Son | — | Massachusetts |
| 38 | Joseph Doherty | 8 | Son | — | Massachusetts |
| 39 | Clement Doherty | 2 | Son | — | 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)