WC
William Conrad — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Madison-County, Illinois
Our Model Tree links this William Conrad across the 1930 and 1940 US Censuses in Madison-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 6-person household.
Age 10
b. ~1930
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Madison-County, Illinois |
| Surname | Conrad |
| Given Name | William D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Alton City |
| 1935 Residence (County) | Madison |
| Additional Details | |
| Highest Grade | S 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Alton City |
| Est. Birth Year | ~1930 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Conrad | Son | — | 10 | ~1930 |
| Fred Conrad | Head | — | 41 | ~1899 |
| Richard Conrad | Son | — | 12 | ~1928 |
| Charles Conrad | Son | — | 9 | ~1931 |
| Selma Conrad | Spouse | — | 29 | ~1911 |
| Marcia Conrad | Daughter | — | 14 | ~1926 |
Census Appearances
1930
Madison, Illinois
Son, age 1
Madison, Illinois · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conrade |
| Given Name | William D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Germany |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Madison-County, Illinois
Son, age 10
Madison-County, Illinois · implied b. ~1930 — 6 household members
| Surname | Conrad |
| Given Name | William D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Alton City |
| 1935 Residence (County) | Madison |
| Highest Grade | S 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Conrad across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Conrad
Son · 1940 · age 10 · b. ~1930 · Illinois
★ You are viewing this record
Sibling
Richard Conrad
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marcia Conrad
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Conrad
Sibling · 1940 · age 9
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 — Madison-County, Illinois
Open full size
1940 US Federal Census — Madison-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00848-00845)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ellard O. Matthews | 46 | Step-son | Shipper | Illinois |
| 42 | Charles A. Ice | 52 | Head | Fitter | Illinois |
| 43 | June P. Ice | 38 | Wife | Secretary | Illinois |
| 44 | Lonna Lou Parker | 14 | Daughter | — | Illinois |
| 45 | Dennis Smith | 37 | Boarder | Odd Jobs | Illinois |
| 46 | Dewain L. Nevins | 25 | Head | Office Worker | Illinois |
| 47 | Dorothy D. Nevins | 24 | Wife | — | Illinois |
| 48 | Catherine E. Ratz | 48 | Lodger | Research | Illinois |
| 49 | Armand S. Leyda | 24 | Head | Engineer | Louisiana |
| 50 | Emil H. Michelbush | 40 | Head | Accountant | Illinois |
| 51 | Alma C. Michelbush | 36 | Wife | — | Illinois |
| 52 | Addie Chappell | 66 | Head | — | Illinois |
| 53 | Oscar E. Rudolph | 55 | Head | Agent (Ticket) | Illinois |
| 54 | Anna M. Rudolph | 50 | Wife | — | Missouri |
| 55 | Edna M. Rudolph | 29 | Daughter | Stenographer | Illinois |
| 56 | Frank D. Rudolph | 5 | Son | — | Illinois |
| 57 | Edward A. Rudolph | 26 | Son | Agent | Illinois |
| 58 | Fred R. Conrad | 41 | Head | Shop Foreman (Wholesale) | Illinois |
| 59 | Selma Conrad | 29 | Wife | — | Illinois |
| 60 | Marcia L. Conrad | 14 | Daughter | — | Illinois |
| 61 | Richard L. Conrad | 12 | Son | — | Illinois |
| 62 | William D. Conrad THIS PERSON | 10 | Son | — | Illinois |
| 63 | Charles O. Conrad | 9 | Son | — | Illinois |
| 64 | Charles Mcluig|Mcluiz | 49 | Head | Watchman | Pennsylvania |
| 65 | Olive O. Mcluig|Mcluiz | 42 | Wife | Packing | Illinois |
| 66 | Doran D. Belcher | 50 | Head | Carpenter | Illinois |
| 67 | Nella M. Belcher | 51 | Wife | — | Illinois |
| 68 | Mary K. Belcher | 20 | Daughter | — | Illinois |
| 69 | Carl G. Belcher | 16 | Son | — | Illinois |
| 70 | Rawley P. King | 49 | Head | Steam Fitter | Missouri |
| 71 | Lela M. King | 46 | Wife | — | Illinois |
| 72 | Tommy D. King | 11 | Son | — | Illinois |
| 73 | George S. Best | 32 | Head | Fitter | England |
| 74 | Olive Best | 31 | Wife | — | Illinois |
| 75 | John E. Moll | 53 | Head | Sales Manager | Illinois |
| 76 | Katherine P. Moll | 54 | Wife | — | Illinois |
| 77 | Dorothy M. Moll | 19 | Daughter | — | Illinois |
| 78 | William J. Urban | 43 | Head | Mechanical Engineer | Illinois |
| 79 | Genevieve Urban | 38 | Wife | — | Illinois |
| 80 | Julia E. Urban | 13 | Daughter | — | Illinois |
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)