JL
John Lambert — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Weber-County, Utah
Our Model Tree links this John Lambert across the 1930 and 1940 US Censuses in Weber-County, Utah (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 10-person household.
Age 16
b. ~1924
Male
Son
Born: Utah
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Weber-County, Utah |
| Surname | Lambert |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Ogden City |
| 1935 Residence (County) | Weber |
| Additional Details | |
| Class of Worker | S |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same House |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Township / Ward | Ogden City |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Carol Lambert | Daughter | — | 13 | ~1927 |
| Marion Lambert | Daughter | — | 22 | ~1918 |
| Louise Lambert | Daughter | — | 20 | ~1920 |
| Jacob Lambert | Head | — | 50 | ~1890 |
| Walter Lambert | Son | — | 17 | ~1923 |
| Donald Lambert | Son | — | 12 | ~1928 |
| Harry Lambert | Son | — | 7 | ~1933 |
| John Lambert | Son | — | 16 | ~1924 |
| Perry Lambert | Son | — | 10 | ~1930 |
| Susan Lambert | Spouse | — | 49 | ~1891 |
Census Appearances
1930
Weber, Utah
Son, age 6
Weber, Utah · implied b. ~1924 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lambert |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Occupation | none |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Weber-County, Utah
Son, age 16
Weber-County, Utah · implied b. ~1924 — 10 household members
| Surname | Lambert |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Ogden City |
| 1935 Residence (County) | Weber |
| Class of Worker | S |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same House |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
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 Lambert across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Lambert
Son · 1940 · age 16 · b. ~1924 · Utah
★ You are viewing this record
Sibling
Walter Lambert
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Lambert
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carol Lambert
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Perry Lambert
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Lambert
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Lambert
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Lambert
Sibling · 1940 · age 20
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 — Weber-County, Utah
Open full size
1940 US Federal Census — Weber-County, Utah
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-04222-00342)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Lund | 67 | Head | — | Utah |
| 2 | Boyd Smith | 35 | Head | Section Foreman | Washington |
| 3 | Enid Smith | 28 | Wife | — | Idaho |
| 4 | Leonard Smith | 5 | Son | — | — |
| 5 | Karen Smith | 1 | Daughter | — | — |
| 7 | Jacob Lambert | 50 | Head | Watchman | Utah |
| 8 | Susan Lambert | 49 | Wife | — | Utah |
| 9 | Marion Lambert | 22 | Daughter | Laundry Worker | Utah |
| 10 | Louise Lambert | 20 | Daughter | — | Utah |
| 11 | Walter Lambert | 17 | Son | — | Utah |
| 12 | John Lambert THIS PERSON | 16 | Son | — | Utah |
| 13 | Carol Lambert | 13 | Daughter | — | Utah |
| 14 | Donald Lambert | 12 | Son | — | Utah |
| 15 | Perry Lambert | 10 | Son | — | Utah |
| 16 | Harry Lambert | 7 | Son | — | Utah |
| 17 | Louis Everett | 30 | Head | Section Foreman | Utah |
| 18 | Cleone Everett | 28 | Wife | — | Utah |
| 19 | Bernard Everett | 7 | Son | — | Utah |
| 20 | Raymond Everett | 4 | Son | — | — |
| 21 | Marlene Everett | 3 | Daughter | — | — |
| 22 | Alfred Graldini | 40 | Head | Section Foreman | Italy |
| 23 | Mary Graldini | 34 | Wife | — | Colorado |
| 24 | Fedora Graldini | 14 | Daughter | — | Utah |
| 25 | Donna Graldini | 10 | Daughter | — | Utah |
| 26 | Frederick C. Sims | 79 | Head | — | England |
| 27 | Rosa Sims | 71 | Wife | — | England |
| 28 | Myrtle Sims | 46 | Daughter | — | Utah |
| 29 | Annie M. Sims | 28 | Daughter | Operator | Utah |
| 30 | Emily Freeder | 37 | Daughter | — | Utah |
| 31 | Irving Freeder | 36 | Son-in-law | Clerk | Utah |
| 32 | Mary Lou Freeder | 13 | Granddaughter | — | Utah |
| 33 | William Freeder | 10 | Grandson | — | Utah |
| 34 | Barbara Freeder | 5 | Granddaughter | — | — |
| 35 | Alex Newcomb | 52 | Head | Crane Operator | Wyoming |
| 36 | Anna Newcomb | 43 | Wife | — | Utah |
| 37 | Earnest Rounds | 45 | Head | Engineer | Utah |
| 38 | Stella Rounds | 43 | Wife | — | Utah |
| 39 | Blaine Rounds | 17 | Son | — | Utah |
| 40 | Wayne Rounds | 17 | Son | — | Utah |
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)