LS
Leonard Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Roosevelt-County, Montana
Our Model Tree links this Leonard Smith across the 1930 and 1940 US Censuses in Roosevelt-County, Montana (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 11-person household.
Age 16
b. ~1924
Male
Son
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Roosevelt-County, Montana |
| Surname | Smith |
| Given Name | Leonard J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | American Indian |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Roosevelt |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Montana |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Township / Ward | School Dist 9 |
| Est. Birth Year | ~1924 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Leonard | Age | Birth yr |
|---|---|---|---|---|
| Pearl Smith | Daughter | — | 11 | ~1929 |
| Rose Smith | Daughter | — | 6 | ~1934 |
| Lillian Smith | Daughter | — | 19 | ~1921 |
| Marie Smith | Daughter | — | 4 | ~1936 |
| Charles Smith | Head | — | 49 | ~1891 |
| Bertha Frank | Other | — | 82 | ~1858 |
| Frank Smith | Son | — | 9 | ~1931 |
| Leonard Smith | Son | — | 16 | ~1924 |
| Robert Smith | Son | — | 1 | ~1939 |
| Charles Smith | Son | — | 14 | ~1926 |
| Emma Smith | Spouse | — | 39 | ~1901 |
Census Appearances
1930
Roosevelt, Montana
Son, age 5
Roosevelt, Montana · implied b. ~1925 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Leonard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | American Indian |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Mixed Blood |
| Mother's Birthplace | Assinniboine |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Roosevelt-County, Montana
Son, age 16
Roosevelt-County, Montana · implied b. ~1924 — 11 household members
| Surname | Smith |
| Given Name | Leonard J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | American Indian |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Roosevelt |
| Highest Grade | H-1 |
| 1935 Residence | Montana |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Leonard Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Leonard Smith
Son · 1940 · age 16 · b. ~1924 · Montana
★ You are viewing this record
Sibling
Robert Smith
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Smith
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Smith
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Smith
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Smith
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Smith
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pearl Smith
Sibling · 1940 · age 11
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 — Roosevelt-County, Montana
Open full size
1940 US Federal Census — Roosevelt-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02228-00587)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Smith | 54 | Head | Carpenter | Montana |
| 2 | Alice Smith | 47 | Wife | — | Montana |
| 3 | Fanny Smith | 21 | Daughter | — | Montana |
| 4 | Analou Smith | 13 | Daughter | — | Montana |
| 5 | Irine Smith | 11 | Daughter | — | Montana |
| 6 | Marie Smith | 9 | Daughter | — | Montana |
| 7 | Mabel Smith | 5 | Daughter | — | Montana |
| 8 | William Ogle | 47 | Head | Farmer | Montana |
| 9 | Marie Ogle | 47 | Wife | — | Montana |
| 10 | William Ogle | 23 | Son | — | Montana |
| 11 | Raymond Ogle | 21 | Son | — | Montana |
| 12 | Albert Longer | 34 | Head | Farmer | Montana |
| 13 | Eva Longer | 26 | Wife | — | North Dakota |
| 14 | Louis David Longer | 6 | Son | — | Montana |
| 15 | Melvin Longer | 2 | Son | — | Montana |
| 16 | Blanche Longer | 0 | Daughter | — | Montana |
| 17 | Charles Fred Smith | 49 | Head | Farmer | Montana |
| 18 | Emma Smith | 39 | Wife | — | Montana |
| 19 | Lillian R Smith | 19 | Daughter | — | Montana |
| 20 | Leonard J Smith THIS PERSON | 16 | Son | — | Montana |
| 21 | Charles H Smith | 14 | Son | — | Montana |
| 22 | Pearl Louise Smith | 11 | Daughter | — | Montana |
| 23 | Frank Edward Smith | 9 | Son | — | Montana |
| 24 | Rose Mary Smith | 6 | Daughter | — | Montana |
| 25 | Marie Anna Smith | 4 | Daughter | — | Montana |
| 26 | Robert Louis Smith | 1 | Son | — | Montana |
| 27 | Bertha Frank | 82 | Mother-in-law | — | Montana |
| 28 | Fred Walkingeagle | 52 | Head | Farmer | Montana |
| 29 | Lillie Walkingeagle | 49 | Wife | — | Canada |
| 30 | William H Walkingeagle | 17 | Son | — | Canada |
| 31 | Louise Walkingeagle | 8 | Daughter | — | Montana |
| 32 | Carl Walkingeagle | 56 | Head | Farmer | Montana |
| 33 | Nettie Walkingeagle | 54 | Wife | — | Montana |
| 34 | Marcia Walkingeagle | 16 | Daughter | — | Montana |
| 35 | John Whitelawk | 66 | Head | Farmer | Montana |
| 36 | Medicine Woman Whitelawk | 56 | Wife | — | Montana |
| 37 | Henry Shields | 72 | Roomer | — | Montana |
| 38 | Whiteshield | 84 | Roomer | — | Montana |
| 39 | Matt Ring | 62 | Roomer | — | Montana |
| 40 | Charlie Shields | 42 | Head | Farmer | Montana |
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)