JL
James Leonard — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this James Leonard across the 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 10-person household.
Age 19
b. ~1921
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Leonard |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Occupation | attendant |
| Industry | Oil Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 884 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Attendant |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1921 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Katherine Leonard | Daughter | — | 24 | ~1916 |
| Loretta Leonard | Daughter | — | 16 | ~1924 |
| Margaret Leonard | Daughter | — | 13 | ~1927 |
| James Leonard | Head | — | 73 | ~1867 |
| Edward Leonard | Other | — | 64 | ~1876 |
| Thomas Leonard | Son | — | 21 | ~1919 |
| James Leonard | Son | — | 19 | ~1921 |
| John Leonard | Son | — | 11 | ~1929 |
| Richard Leonard | Son | — | 9 | ~1931 |
| Loretta Leonard | Spouse | — | 44 | ~1896 |
Census Appearances
1930
San Francisco, …
Son, age 5
San Francisco, California · implied b. ~1925 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Veteran | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Son, age 19
San-Francisco-County, California · implied b. ~1921 — 10 household members
| Surname | Leonard |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Occupation | attendant |
| Industry | Oil Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 884 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 James Leonard across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Leonard
Son · 1940 · age 19 · b. ~1921 · California
★ You are viewing this record
Sibling
Richard Leonard
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Leonard
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Leonard
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Leonard
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Loretta Leonard
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Leonard
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 — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00312-00125)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 42 | Steele Labagh | 69 | Head | Plumber | Iowa |
| 43 | Cecelia Labagh | 63 | Wife | — | Kansas |
| 44 | Francis Labagh | 27 | Son | Clerk | California |
| 45 | Virginia Labagh | 18 | Daughter | New Worker | California |
| 46 | Jack Norwood | 33 | Head | Clerk | Texas |
| 47 | Norma Norwood | 33 | Wife | — | California |
| 48 | Robert Norwood | 2 | Son | — | California |
| 49 | Fred Sr. Kaiser | 68 | Head | Clerk | California |
| 50 | Emilie Kaiser | 60 | Wife | — | California |
| 51 | Myrtle Kaiser | 38 | Daughter | Labor | California |
| 52 | Helen Kaiser | 34 | Daughter | Clerk | California |
| 53 | Fred Jr. Kaiser | 28 | Son | Longshoreman | California |
| 54 | Charles Boone | 10 | Lodger | — | California |
| 55 | Clara Inch | 54 | Head | — | Ohio |
| 56 | Shelley Inch | 29 | Son | Agent | California |
| 57 | Muriel Vonichumsen | 63 | Lodger | — | California |
| 58 | Chas Lease | 22 | Lodger | Clerk | California |
| 59 | Abe Kiewie | 25 | Lodger | — | Germany |
| 60 | Joseph Arrons | 26 | Lodger | — | Arizona |
| 61 | Bessie Arrons | 20 | Lodger | Stenographer | Arizona |
| 62 | James Leonard | 73 | Head | — | California |
| 63 | Loretta Leonard | 44 | Wife | — | New York |
| 64 | Katherine Leonard | 24 | Daughter | — | California |
| 65 | Thomas Leonard | 21 | Son | New Worker | California |
| 66 | James Leonard THIS PERSON | 19 | Son | Attendant | California |
| 67 | Loretta Leonard | 16 | Daughter | — | California |
| 68 | Margaret Leonard | 13 | Daughter | — | California |
| 69 | John Leonard | 11 | Son | — | California |
| 70 | Richard Leonard | 9 | Son | — | California |
| 71 | Edward Leonard | 64 | Brother | Attorney | California |
| 72 | Dan Wallace | 73 | Head | — | Ohio |
| 73 | Robert Wallace | 26 | Son | Restaurant | California |
| 74 | Hazel Wallace | 23 | Daughter | Restaurant | Washington |
| 75 | William Dutton | 47 | Head | Engineer | California |
| 76 | Lila Dutton | 42 | Wife | — | California |
| 77 | Windsor Nordin | 44 | Head | Bookkeeper | Nebraska |
| 78 | Jessie Nordin | 29 | Wife | — | Texas |
| 79 | Duane Nordin | 10 | Son | — | Texas |
| 80 | Jones | 52 | Head | — | Pennsylvania |
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)