LS
Leo Smith — 1930 US Census Record
Model Tree available1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Leo Smith across the 1910, 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed), with identified parents Elizabeth & Elizabeth — first a son (b.~1905), then head of a 4-person household.
Age 25
b. ~1905
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Smith |
| Given Name | Leo |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New York |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Engraver |
| Industry | Newspaper Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Engraver |
| Township / Ward | Cambridge City |
| Est. Birth Year | ~1905 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Leo | Age | Birth yr |
|---|---|---|---|---|
| Florence Smith | Daughter | — | 18 | ~1912 |
| Elizabeth Smith | Head | — | 50 | ~1880 |
| Leo Smith | Son | — | 25 | ~1905 |
| Joseph Smith | Son | — | 21 | ~1909 |
Census Appearances
1910
Middlesex, Massachusetts
Other, age 5
Middlesex, Massachusetts · implied b. ~1905 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Leo |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New York |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Son, age 14
Middlesex, Massachusetts · implied b. ~1906 — 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 | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New York |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 25
Middlesex, Massachusetts · implied b. ~1905 — 4 household members
| Surname | Smith |
| Given Name | Leo |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New York |
| Mother's Birthplace | Massachusetts |
| Occupation | Engraver |
| Industry | Newspaper Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 3 US Census years (1910, 1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage. Identified parents: mother Elizabeth Smith (~0.92 confidence) and mother Elizabeth Smith (~0.92 confidence) and father James Smith (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Elizabeth Smith
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Elizabeth Smith
b. ~1881
Source mother
● Household
· direct · ~0.92
Father
James Smith
b. ~1882
Source father
● Household
· direct · ~0.92
This person
Anchor record
Leo Smith
Son · 1930 · age 25 · b. ~1905 · Massachusetts
★ You are viewing this record
Sibling
Joseph Smith
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Smith
Sibling · 1930 · age 18
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
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
23 people indexed on this census page (ia:1930:massachusettscensus00reel915:0155)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Grady William | 12 | Son | — | Massachusetts |
| 2 | Helen Grady William | 19 | Daughter | — | Massachusetts |
| 3 | Michael Fleming | 20 | Nephew | Stenographer | Massachusetts |
| 4 | Mary O'Brien | 17 | Niece | — | Irish Free State |
| 5 | Elizabeth Smith | 50 | Head | Stitcher | Massachusetts |
| 6 | Leo Smith THIS PERSON | 25 | Son | Engraver | Massachusetts |
| 7 | Joseph Smith | 21 | Son | Engraver | Massachusetts |
| 8 | Florence Smith | 18 | Daughter | — | Massachusetts |
| 9 | Enrico Bulcamino | 34 | Head | Laborer | Italy |
| 10 | Mary Bulcamino | 20 | Wife-H | — | Massachusetts |
| 11 | Mary Bulcamino | 2 | Daughter | — | Massachusetts |
| 12 | Josephine Bulcamino | 0 | Daughter | — | Massachusetts |
| 13 | John Cordeiro | 46 | Head | Salesman | Portugal |
| 14 | Mary Cordeiro | 42 | Wife-H | — | Massachusetts |
| 15 | Edward Cordeiro | 11 | Son | — | Massachusetts |
| 16 | George Cordeiro | 5 | Son | — | Massachusetts |
| 17 | Charles Mcelroy | 32 | Head | Chauffeur | Massachusetts |
| 18 | Thomas Lane | 25 | Nephew | Social Club | Massachusetts |
| 19 | Ruth Lane | 22 | Niece | — | Massachusetts |
| 20 | Francis F. Lane | 0 | Great Nephew | — | Massachusetts |
| 21 | Thomas Mccabe | 42 | Head-H | Carpenter | Irish Free State |
| 22 | Charles Purinton | 51 | Boarder | Laborer | Canada-English |
| 23 | Ray Matthews | 22 | Boarder | Chauffeur | Massachusetts |
Pedigree Summary
Leo + 2 siblings
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 1930 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)