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William Lucas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Howard-County, Iowa
Our Model Tree links this William Lucas across the 1930 and 1940 US Censuses in Howard-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 8-person household.
Age 15
b. ~1925
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Howard-County, Iowa |
| Surname | Lucas |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Howard |
| Additional Details | |
| Highest Grade | S 6 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Vernon Springs Twp |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Grace Lucas | Daughter | — | 5 | ~1935 |
| John Lucas | Head | — | 49 | ~1891 |
| Lawrence Lucas | Son | — | 7 | ~1933 |
| William Lucas | Son | — | 15 | ~1925 |
| Roland Lucas | Son | — | 10 | ~1930 |
| John Lucas | Son | — | 14 | ~1926 |
| Onie Lucas | Son | — | 12 | ~1928 |
| Eva Lucas | Spouse | — | 45 | ~1895 |
Census Appearances
1930
Howard, Iowa
Son, age 6
Howard, Iowa · implied b. ~1924 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucas |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Howard-County, Iowa
Son, age 15
Howard-County, Iowa · implied b. ~1925 — 8 household members
| Surname | Lucas |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Howard |
| Highest Grade | S 6 |
| 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 William Lucas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Lucas
Son · 1940 · age 15 · b. ~1925 · Iowa
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Sibling
Onie Lucas
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Lucas
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roland Lucas
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Lucas
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Lucas
Sibling · 1940 · age 7
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 — Howard-County, Iowa
Open full size
1940 US Federal Census — Howard-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01167-00399)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Orlando A. Stinger | 57 | Head | Farm Operator | Iowa |
| 2 | Anna M. Stinger | 56 | Wife | — | Iowa |
| 3 | Orlando Jr. Stinger | 17 | Son | — | Iowa |
| 4 | John Maudrine | 24 | Hired hand | Farm Hand | Illinois |
| 5 | William Pittelko | 60 | Head | Farm Operator | Germany |
| 6 | Susan G. Pittelko | 60 | Wife | — | Iowa |
| 7 | William P. Farrell | 65 | Head | Farm Operator | Iowa |
| 8 | Emma J. Farrell | 60 | Sister | — | Iowa |
| 9 | John Farrell | 80 | Brother | — | Iowa |
| 10 | Charles A. De Walle | 58 | Head | Farm Operator | Iowa |
| 11 | Mary E. De Walle | 58 | Wife | — | Iowa |
| 12 | Francis M. De Walle | 30 | Son | Farm Hand | Iowa |
| 13 | Frank E. Farrell | 25 | Nephew | — | Iowa |
| 14 | Joseph R. Patterson | 62 | Head | Farm Operator | Iowa |
| 15 | Margaret L. Patterson | 55 | Wife | — | Iowa |
| 16 | Robert R. Patterson | 18 | Son | — | Iowa |
| 17 | Charles Liddall | 76 | Boarder | — | Iowa |
| 18 | James H. Daley | 49 | Head | Farm Operator | Iowa |
| 19 | Robert C. Daley | 47 | Brother | Farm Operator | Iowa |
| 20 | John F. Daley | 16 | Nephew | — | Iowa |
| 21 | Leroy Salisbury | 62 | Head | Farm Operator | Iowa |
| 22 | Mary A. Salisbury | 57 | Wife | — | Iowa |
| 23 | Charles W. Salisbury | 21 | Son | Clerk | Iowa |
| 24 | Herbert J. Salisbury | 61 | Head | Farm Operator | Iowa |
| 25 | Florence M. Salisbury | 55 | Wife | — | Iowa |
| 26 | Eleanor E. Salisbury | 20 | Daughter | — | Iowa |
| 27 | Mary L. Salisbury | 13 | Daughter | — | Iowa |
| 28 | James L. Salisbury | 12 | Son | — | Iowa |
| 29 | Gene L. Salisbury | 12 | Son | — | Iowa |
| 30 | John A. Lucas | 49 | Head | Wpa Laborer | Iowa |
| 31 | Eva L. Lucas | 45 | Wife | — | Iowa |
| 32 | William Lucas THIS PERSON | 15 | Son | — | Iowa |
| 33 | John Jr. Lucas | 14 | Son | — | Iowa |
| 34 | Onie R. Lucas | 12 | Son | — | Iowa |
| 35 | Roland Lucas | 10 | Son | — | Iowa |
| 36 | Lawrence Lucas | 7 | Son | — | Iowa |
| 37 | Grace Lucas | 5 | Daughter | — | Iowa |
| 38 | Charles R. Conklin | 29 | Head | Painter | Iowa |
| 39 | Goldie M. Conklin | 24 | Daughter | — | Iowa |
| 40 | Doris M. Conklin | 6 | Daughter | — | Iowa |
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)