JW
James Willis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Weld-County, Colorado
Our Model Tree links this James Willis across the 1930 and 1940 US Censuses in Weld-County, Colorado (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Weld-County, Colorado |
| Surname | Willis |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Rural |
| 1935 Residence (County) | Weld |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Ep 31 Keenesburg |
| Est. Birth Year | ~1925 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| John Willis | Head | — | 54 | ~1886 |
| Bernard Braddy | Other | — | 21 | ~1919 |
| Donald Willis | Son | — | 14 | ~1926 |
| James Willis | Son | — | 15 | ~1925 |
| Walter Willis | Son | — | 18 | ~1922 |
| Joseph Willis | Son | — | 20 | ~1920 |
| Lynn Willis | Son | — | 11 | ~1929 |
| Leslie Willis | Son | — | 17 | ~1923 |
| Hilda Willis | Spouse | — | 48 | ~1892 |
Census Appearances
1930
Weld, Colorado
Son, age 5
Weld, Colorado · implied b. ~1925 — 35 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Willis |
| Given Name | James F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Nebraska |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Weld-County, Colorado
Son, age 15
Weld-County, Colorado · implied b. ~1925 — 9 household members
| Surname | Willis |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Rural |
| 1935 Residence (County) | Weld |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Willis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Willis
Son · 1940 · age 15 · b. ~1925 · Colorado
★ You are viewing this record
Sibling
Lynn Willis
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Willis
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leslie Willis
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Willis
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Willis
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 — Weld-County, Colorado
Open full size
1940 US Federal Census — Weld-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00482-00118)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Kathryn C. Carston | 51 | Head | Member Of | Missouri |
| 2 | Donald H. Carston | 22 | Son | Engineer Crew | Colorado |
| 3 | George D. Carston | 20 | Son | Hired Hand | Colorado |
| 4 | Margaret E. Carston | 19 | Daughter | Public Library | Colorado |
| 5 | Edna Jefferson | 65 | Head | Ranching | Minnesota |
| 6 | John Willis | 54 | Head | Farming | Kansas |
| 7 | Hilda Willis | 48 | Wife | Housewife | Nebraska |
| 8 | Joseph Willis | 20 | Son | Farming | Colorado |
| 9 | Walter Willis | 18 | Son | Labour | Colorado |
| 10 | Leslie Willis | 17 | Son | — | Colorado |
| 11 | James Willis THIS PERSON | 15 | Son | — | Colorado |
| 12 | Donald Willis | 14 | Son | — | Colorado |
| 13 | Lynn H. Willis | 11 | Son | — | Colorado |
| 14 | Bernard Braddy | 21 | Lodger | Labour | Wyoming |
| 15 | James M. Houghton | 58 | Head | — | Virginia |
| 16 | Clara Houghton | 55 | Wife | Housewife | Missouri |
| 17 | Cleo Houghton | 22 | Son | Labour | Missouri |
| 18 | Wilbur Houghton | 18 | Son | — | Missouri |
| 19 | Clarence Borges | 52 | Head | Ranching | Kansas |
| 20 | Cecil Borges | 50 | Wife | Housewife | Colorado |
| 21 | Roy S. Barfoot | 54 | Head | Ranching | Wisconsin |
| 22 | William Cameron | 68 | Lodger | — | Iowa |
| 23 | Minnie M. Cameron | 54 | Lodger | — | Iowa |
| 24 | Frank G. Maier | 40 | Head | Ranch Foreman | Minnesota |
| 25 | Fern Maier | 42 | Wife | Housewife | Minnesota |
| 26 | Maxine Maier | 15 | Daughter | — | Colorado |
| 27 | Norman Maier | 13 | Son | — | Colorado |
| 28 | Billie Maier | 11 | Son | — | Colorado |
| 29 | Bonnie Maier | 5 | Daughter | — | Colorado |
| 30 | Daryl Maier | 3 | Son | — | Colorado |
| 31 | Harry D. Palmer | 61 | Head | Active Farmer | Iowa |
| 32 | Florence Palmer | 52 | Wife | Housewife | Illinois |
| 33 | Irl D. Burnell | 40 | Head | Farming | Nebraska |
| 34 | Hazel Burnell | 35 | Wife | Housewife | Nebraska |
| 35 | George Dietrich | 19 | Hired hand | Hired Farm Boy | Iowa |
| 36 | Charles Mclaughery | 24 | Hired hand | Hired Farm Hand | Kansas |
| 37 | Clair C. Church | 57 | Head | Farmer | Illinois |
| 38 | Floy Church | 54 | Wife | Housewife | Illinois |
| 39 | Susan D. Mcdowell | 44 | Head | Housewife | Scotland |
| 40 | Jimmie W. Mcdowell | 18 | Son | Farmer | Scotland |
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)