LS
Leo Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hampden-County, Massachusetts
Our Model Tree links this Leo Smith across the 1930 and 1940 US Censuses in Hampden-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hampden-County, Massachusetts |
| Surname | Smith |
| Given Name | Leo |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Hampden |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Springfield |
| Est. Birth Year | ~1929 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Leo | Age | Birth yr |
|---|---|---|---|---|
| Jeanine Smith | Daughter | — | 9 | ~1931 |
| Irene Smith | Daughter | — | 2 | ~1938 |
| Theresa Smith | Daughter | — | 8 | ~1932 |
| Lillian Smith | Daughter | — | 7 | ~1933 |
| Albert Smith | Head | — | 38 | ~1902 |
| Leo Smith | Son | — | 11 | ~1929 |
| Arthur Smith | Son | — | 5 | ~1935 |
| Bernadette Smith | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Hampden, Massachusetts
Son, age 1
Hampden, Massachusetts · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Leo |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Canada-French |
| Mother's Birthplace | Canada-French |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Hampden-County, Massachusetts
Son, age 11
Hampden-County, Massachusetts · implied b. ~1929 — 8 household members
| Surname | Smith |
| Given Name | Leo |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Hampden |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same House |
| 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 Leo Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Leo Smith
Son · 1940 · age 11 · b. ~1929 · Massachusetts
★ You are viewing this record
Sibling
Lillian Smith
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Smith
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Smith
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jeanine Smith
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Smith
Sibling · 1940 · age 8
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 — Hampden-County, Massachusetts
Open full size
1940 US Federal Census — Hampden-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01707-00638)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Paul Mahoney | 33 | Wife | — | Massachusetts |
| 42 | Patricia Mahoney | 6 | Daughter | — | Massachusetts |
| 43 | John E Mahoney | 4 | Son | — | Massachusetts |
| 44 | Michael Griffin | 50 | Head | Laborer | Irish Free State |
| 45 | Mary Griffin | 44 | Wife | Laundress | Irish Free State |
| 46 | Maurice Griffin | 20 | Son | New Worker | Massachusetts |
| 47 | John P Griffin | 19 | Son | Elevator Man | Massachusetts |
| 48 | Margaret Griffin | 18 | Daughter | — | Massachusetts |
| 49 | Marie A Griffin | 13 | Daughter | — | Massachusetts |
| 50 | Tony Klimaszewski | 52 | Head | — | Poland |
| 51 | Rose Klimaszewski | 50 | Wife | Sorting | Poland |
| 52 | Patrick Griffin | 32 | Head | Laborer | Irish Free State |
| 53 | Rose Griffin | 29 | Wife | — | Irish Free State |
| 54 | Margaret Griffin | 2 | Daughter | — | Massachusetts |
| 55 | Bronislaw Florek | 31 | Head | Laborer | Poland |
| 56 | Frances Florek | 26 | Wife | Housework | Massachusetts |
| 57 | John Plumay | 57 | Head | Laborer | Poland |
| 58 | Mary Plumay | 58 | Wife | — | Poland |
| 59 | Vladimir Lagodich | 58 | Lodger | Sawyer (Repair) | Poland |
| 60 | Eric Steward | 37 | Head | Laborer | Massachusetts |
| 61 | Irene Steward | 35 | Wife | — | French Canada |
| 62 | Eric Steward | 15 | Son | — | Massachusetts |
| 63 | Shirley Steward | 12 | Daughter | — | Massachusetts |
| 64 | Frederick Steward | 5 | Son | — | Massachusetts |
| 65 | Albert Smith | 38 | Head | Ice Man | French Canada |
| 66 | Bernadette Smith | 36 | Wife | — | French Canada |
| 67 | Leo Smith THIS PERSON | 11 | Son | — | Massachusetts |
| 68 | Jeanine Smith | 9 | Daughter | — | Massachusetts |
| 69 | Theresa Smith | 8 | Daughter | — | Massachusetts |
| 70 | Lillian Smith | 7 | Daughter | — | Massachusetts |
| 71 | Arthur Smith | 5 | Son | — | Massachusetts |
| 72 | Irene Smith | 2 | Daughter | — | Massachusetts |
| 73 | Cecilia Warrington | 29 | Head | — | Vermont |
| 74 | Anne Warrington | 7 | Daughter | — | Massachusetts |
| 75 | Joseph Warrington | 6 | Son | — | Massachusetts |
| 76 | Ernest Jarvis | 25 | Head | Laborer | Massachusetts |
| 77 | Stella Jarvis | 25 | Wife | — | Massachusetts |
| 78 | Jacob Szewczyk | 41 | Head | Laborer | Poland |
| 79 | Fannie Szewczyk | 34 | Wife | — | Massachusetts |
| 80 | Edward Szewczyk | 10 | 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)