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William Schaefer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dubuque-County, Iowa
Our Model Tree links this William Schaefer across the 1930 and 1940 US Censuses in Dubuque-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 8-person household.
Age 13
b. ~1927
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dubuque-County, Iowa |
| Surname | Schaefer |
| Given Name | William A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Dubuque City |
| 1935 Residence (County) | Dubuque |
| Additional Details | |
| Highest Grade | 7 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Dubuque City |
| Est. Birth Year | ~1927 |
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 |
|---|---|---|---|---|
| Jeanne Schaefer | Daughter | — | 9 | ~1931 |
| Marian Schaefer | Daughter | — | 14 | ~1926 |
| Arline Schaefer | Daughter | — | 17 | ~1923 |
| William Schaefer | Head | — | 43 | ~1897 |
| Rosemary Schaefer | Daughter | — | 16 | ~1924 |
| Dolores Schaefer | Daughter | — | 7 | ~1933 |
| Annette Schaefer | Spouse | — | 44 | ~1896 |
| William Schaefer | Son | — | 13 | ~1927 |
Census Appearances
1930
Dubuque, Iowa
Son, age 1
Dubuque, Iowa · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Schaffer |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dubuque-County, Iowa
Son, age 13
Dubuque-County, Iowa · implied b. ~1927 — 8 household members
| Surname | Schaefer |
| Given Name | William A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Dubuque City |
| 1935 Residence (County) | Dubuque |
| Highest Grade | 7 |
| 1935 Residence | Same House |
| 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 Schaefer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Schaefer
Son · 1940 · age 13 · b. ~1927 · Iowa
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Sibling
Rosemary Schaefer
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marian Schaefer
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dolores Schaefer
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jeanne Schaefer
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arline Schaefer
Sibling · 1940 · age 17
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 — Dubuque-County, Iowa
Open full size
1940 US Federal Census — Dubuque-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01158-00339)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William E. Schaefer | 43 | Head | Manager | Iowa |
| 42 | Annette D. Schaefer | 44 | Wife | — | Iowa |
| 43 | Arline M. Schaefer | 17 | Daughter | — | Iowa |
| 44 | Rosemary J. Schaefer | 16 | Daughter | — | Iowa |
| 45 | Marian L. Schaefer | 14 | Daughter | — | Iowa |
| 46 | William A. Schaefer THIS PERSON | 13 | Son | — | Iowa |
| 47 | Jeanne Anne Schaefer | 9 | Daughter | — | Iowa |
| 48 | Dolores M. Schaefer | 7 | Daughter | — | Iowa |
| 49 | Francis E. Haut | 31 | Head | Salesman | Illinois |
| 50 | Ruth C. Haut | 28 | Wife | — | Nebraska |
| 51 | William E. Haut | 2 | Son | — | Iowa |
| 52 | Clifford Calvert | 38 | Head | Pipe Fitter | Iowa |
| 53 | Bertha E. Calvert | 42 | Wife | — | Iowa |
| 54 | John C. Calvert | 15 | Son | — | Iowa |
| 55 | George B.B. Groppe | 22 | Head | — | Iowa |
| 56 | James Buck | 17 | Ward | — | Wisconsin |
| 57 | Mary Bautsch | 72 | Mother-in-law | — | Wisconsin |
| 58 | Milton F. Wolff | 28 | Head | Printer | Iowa |
| 59 | Mary A. Wolff | 31 | Wife | — | Iowa |
| 60 | Michael L. Wolff | 1 | Son | — | Iowa |
| 61 | John Kunnert | 60 | Head | — | Germany |
| 62 | Josephine Kunnert | 54 | Wife | — | West Virginia |
| 63 | Angelo Puellas | 50 | Head | Partner | Barbie |
| 64 | Ellen M. Puellas | 40 | Wife | — | Iowa |
| 65 | Cecilia Fetscher | 62 | Mother-in-law | — | Iowa |
| 66 | Henry W. Pantz | 65 | Head | — | Germany |
| 67 | Kathryn E. Pantz | 59 | Wife | — | Iowa |
| 68 | Richard Krueger | 39 | Head | Salesman | Illinois |
| 69 | Pearl Krueger | 40 | Wife | — | Iowa |
| 70 | Richard Krueger | 6 | Son | — | Iowa |
| 71 | George H. Schilling | 52 | Head | Electric Operator | Iowa |
| 72 | Isabella C. Schilling | 52 | Wife | — | Iowa |
| 73 | Melvin F. Schilling | 24 | Son | Teacher | Iowa |
| 74 | Henry V. Schilling | 74 | Father | — | Iowa |
| 75 | Alfred F. Lighthart | 28 | Head | Lumber Dealer | Kansas |
| 76 | Ethel A. Lighthart | 28 | Wife | — | Iowa |
| 77 | Carl Q. Volk | 50 | Head | Cabinet Maker | Iowa |
| 78 | Carl R. Loibl | 45 | Head | Brakeman | Iowa |
| 79 | Gertrude M. Loibl | 45 | Wife | — | Iowa |
| 80 | Harlan F. Loibl | 17 | Son | — | 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)