RL
Robert Lucas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Robert Lucas across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 7-person household.
Age 10
b. ~1930
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Lucas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | 3 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1930 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Lucas | Son | — | 10 | ~1930 |
| Rita Lucas | Daughter | — | 15 | ~1925 |
| Thomas Lucas | Head | — | 41 | ~1899 |
| Pauline Lucas | Daughter | — | 12 | ~1928 |
| Frederick Lucas | Son | — | 3 | ~1937 |
| Miriam Lucas | Spouse | — | 33 | ~1907 |
| Gertrude Lucas | Daughter | — | 2 | ~1938 |
Census Appearances
1930
Suffolk, Massachusetts
Other, age
Suffolk, Massachusetts · implied b. ~1930 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucas |
| Given Name | Robert |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read/Write | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 10
Suffolk-County, Massachusetts · implied b. ~1930 — 7 household members
| Surname | Lucas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Highest Grade | 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 Robert Lucas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Lucas
Son · 1940 · age 10 · b. ~1930 · Massachusetts
★ You are viewing this record
Sibling
Pauline Lucas
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frederick Lucas
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Lucas
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Lucas
Sibling · 1940 · age 2
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-t0627-01670-00300)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas J. Blaine | 46 | Head | Novelty Salesman | Massachusetts |
| 2 | Margaret Blaine | 47 | Wife | Typist | Massachusetts |
| 3 | Anna Blaine | 20 | Daughter | — | Massachusetts |
| 4 | Catherine Blaine | 17 | Daughter | — | Massachusetts |
| 5 | Alice Blaine | 14 | Daughter | — | Massachusetts |
| 6 | Marion Blaine | 9 | Daughter | — | Massachusetts |
| 7 | Joseph Szymanski | 39 | Head | Painter | Pennsylvania |
| 8 | Natalie Szymanski | 39 | Wife | — | Massachusetts |
| 9 | Joseph Jr. Szymanski | 16 | Son | — | Massachusetts |
| 10 | Janet Szymanski | 14 | Daughter | — | Massachusetts |
| 11 | Ethel Seely | 25 | Head | — | Massachusetts |
| 12 | Roy Seely | 7 | Son | — | Massachusetts |
| 13 | Richard Seely | 5 | Son | — | Massachusetts |
| 14 | Hartwell Seely | 3 | Son | — | Massachusetts |
| 15 | Lewis Seely | 2 | Son | — | Massachusetts |
| 16 | Henry Sexton | 40 | Lodger | Window Cleaner | Massachusetts |
| 17 | Eugene Urbachas | 50 | Head | Chef | Rumania |
| 18 | Nellie Urbachas | 50 | Wife | — | Poland |
| 19 | Edward Urbachas | 25 | Son | Taxi Driver | Massachusetts |
| 20 | Arnold Urbachas | 22 | Son | Baker | Massachusetts |
| 21 | Helen Urbachas | 16 | Daughter | — | Massachusetts |
| 22 | Richard Urbachas | 14 | Son | — | Massachusetts |
| 23 | Alfred Urbachas | 12 | Son | — | Massachusetts |
| 24 | Michael Urbachas | 12 | Son | — | Massachusetts |
| 25 | Arthur Urbachas | 10 | Son | — | Massachusetts |
| 26 | Thomas Lucas | 41 | Head | Electrician Helper | Massachusetts |
| 27 | Miriam Lucas | 33 | Wife | — | Massachusetts |
| 28 | Rita Lucas | 15 | Daughter | — | Massachusetts |
| 29 | Pauline Lucas | 12 | Daughter | — | Massachusetts |
| 30 | Robert Lucas THIS PERSON | 10 | Son | — | Massachusetts |
| 31 | Frederick Lucas | 3 | Son | — | Massachusetts |
| 32 | Gertrude Lucas | 2 | Daughter | — | Massachusetts |
| 33 | Catherine Pierson | 31 | Head | — | Massachusetts |
| 34 | James Pierson | 12 | Son | — | Massachusetts |
| 35 | Barbara Pierson | 11 | Daughter | — | Massachusetts |
| 36 | Dorothy Pierson | 9 | Daughter | — | Massachusetts |
| 37 | Daniel Pierson | 8 | Son | — | Massachusetts |
| 38 | Eleanor Pierson | 7 | Daughter | — | Massachusetts |
| 39 | Robert Pierson | 5 | Son | — | Massachusetts |
| 40 | Malcolm Pierson | 4 | 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)