JL
James Leonard — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wapello-County, Iowa
Our Model Tree links this James Leonard across the 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 11-person household.
Age 16
b. ~1924
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wapello-County, Iowa |
| Surname | Leonard |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Wapello |
| Additional Details | |
| Occupation | 12 New Worker |
| Class of Worker | PW |
| Hours Worked | 3 |
| Highest Grade | 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | 12 New Worker |
| Township / Ward | Ottumwa 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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Lorraine Leonard | Daughter | — | 15 | ~1925 |
| Mary Leonard | Daughter | — | 6 | ~1934 |
| Patricia Leonard | Daughter | — | 9 | ~1931 |
| Grace Leonard | Daughter | — | 13 | ~1927 |
| Juanita Leonard | Daughter | — | 2 | ~1938 |
| William Leonard | Head | — | 62 | ~1878 |
| James Leonard | Son | — | 16 | ~1924 |
| John Leonard | Son | — | 4 | ~1936 |
| Jerry Leonard | Son | — | 2 | ~1938 |
| David Leonard | Son | — | 11 | ~1929 |
| Mary Leonard | Spouse | — | 50 | ~1890 |
Census Appearances
1930
Wapello, Iowa
Son, age 6
Wapello, Iowa · implied b. ~1924 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Wapello-County, Iowa
Son, age 16
Wapello-County, Iowa · implied b. ~1924 — 11 household members
| Surname | Leonard |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Wapello |
| Occupation | 12 New Worker |
| Class of Worker | PW |
| Hours Worked | 3 |
| Highest Grade | 8 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 16 · b. ~1924 · Iowa
★ You are viewing this record
Sibling
David Leonard
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorraine Leonard
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Leonard
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Leonard
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Leonard
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Juanita Leonard
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Leonard
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerry Leonard
Sibling · 1940 · age 2
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 — Wapello-County, Iowa
Open full size
1940 US Federal Census — Wapello-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01209-00673)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Helen Ancell | 26 | house | Housekeeper | Iowa |
| 42 | Betty Jean Ancell | 9 | daughter | — | Iowa |
| 43 | James H. Ancell | 2 | son | — | Iowa |
| 44 | John Diggs | 79 | head | — | Iowa |
| 45 | Laura M. Diggs | 66 | wife | — | Iowa |
| 46 | William Evans | 35 | head | Miner | Iowa |
| 47 | Lilly Evans | 36 | wife | — | Iowa |
| 48 | William O. Evans | 15 | son | — | Iowa |
| 49 | James D. Brown | 62 | head | Miner | Iowa |
| 50 | Sarah A. Brown | 56 | wife | — | Missouri |
| 51 | Jessie Sly | 79 | head | — | Michigan |
| 52 | Drake Ruper | 69 | head | — | Iowa |
| 53 | Sarah H. Ruper | 65 | wife | — | Iowa |
| 54 | James Drew | 64 | lodger | — | Iowa |
| 55 | William H. Leonard | 62 | head | 84 Laborer | Iowa |
| 56 | Mary Leonard | 50 | wife | — | Iowa |
| 57 | James Leonard THIS PERSON | 16 | son | 12 New Worker | Iowa |
| 58 | Lorraine Leonard | 15 | daughter | — | Iowa |
| 59 | Grace Leonard | 13 | daughter | — | Iowa |
| 60 | David Leonard | 11 | son | — | Iowa |
| 61 | Patricia Leonard | 9 | daughter | — | Iowa |
| 62 | Mary Leonard | 6 | daughter | — | Iowa |
| 63 | John Leonard | 4 | son | — | Iowa |
| 64 | Jerry Leonard | 2 | son | — | Iowa |
| 65 | Juanita Leonard | 2 | daughter | — | Iowa |
| 66 | Refford S. Gillis | 47 | head | Locomotive Engineer | Iowa |
| 67 | Harold J. Gillis | 22 | son | Shoeshiner | Iowa |
| 68 | Florence Elliott | 62 | head | — | Iowa |
| 69 | Hoyt Elliott | 36 | son | H'St Farm Hand | Iowa |
| 70 | Carl Hurd | 44 | son-in-law | 520 Carpenter Helper | Iowa |
| 71 | Daisy Hurd | 43 | daughter | — | Iowa |
| 72 | Caroline Halterman | 16 | daughter | — | Missouri |
| 73 | Almira Stevens | 84 | mother-in-law | — | Missouri |
| 74 | Ernest Tidball | 35 | head | Car Mechanic | Iowa |
| 75 | Perle Tidball | 33 | wife | — | Iowa |
| 76 | Ronald S. Tidball | 7 | son | — | Iowa |
| 77 | Belle H. Olney | 69 | head | Physician | Iowa |
| 78 | Levina E. Olney | 37 | daughter | Physician | California |
| 79 | Betty Austin | 75 | servant | House Maid | West Virginia |
| 80 | Herbert E. Davis | 49 | head | Machinist | Missouri |
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)