JW
John Wolfe — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dubuque-County, Iowa
Our Model Tree links this John Wolfe across the 1930 and 1940 US Censuses in Dubuque-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 10-person household.
Age 12
b. ~1928
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dubuque-County, Iowa |
| Surname | Wolfe |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cascade Township |
| 1935 Residence (County) | Dubuque |
| Additional Details | |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Cascade Township |
| Est. Birth Year | ~1928 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Wolfe | Son | — | 12 | ~1928 |
| Roland Wolfe | Son | — | 5 | ~1935 |
| Kay Wolfe | Daughter | — | 7 | ~1933 |
| Elizabeth Wolfe | Daughter | — | 17 | ~1923 |
| William Wolfe | Son | — | 16 | ~1924 |
| Wilma Wolfe | Daughter | — | 15 | ~1925 |
| Charles Wolfe | Head | — | 58 | ~1882 |
| Jerome Wolfe | Son | — | 19 | ~1921 |
| Laura Wolfe | Spouse | — | 46 | ~1894 |
| Leon Wolfe | Son | — | 20 | ~1920 |
Census Appearances
1930
Dubuque, Iowa
Son, age 2
Dubuque, Iowa · implied b. ~1928 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wolfe |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dubuque-County, Iowa
Son, age 12
Dubuque-County, Iowa · implied b. ~1928 — 10 household members
| Surname | Wolfe |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cascade Township |
| 1935 Residence (County) | Dubuque |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| 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 John Wolfe across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Wolfe
Son · 1940 · age 12 · b. ~1928 · Iowa
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Sibling
Leon Wolfe
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roland Wolfe
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Wolfe
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Wolfe
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerome Wolfe
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kay Wolfe
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wilma Wolfe
Sibling · 1940 · age 15
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-t0627-01158-00050)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles E Wolfe | 58 | Head | Farmer | Iowa |
| 42 | Laura Wolfe | 46 | Wife | — | Iowa |
| 43 | Leon Wolfe | 20 | Son | Farm Laborer | Iowa |
| 44 | Jerome Wolfe | 19 | Son | Farm Laborer | Iowa |
| 45 | Elizabeth Wolfe | 17 | Daughter | — | Iowa |
| 46 | William Wolfe | 16 | Son | Farm Laborer | Iowa |
| 47 | Wilma Wolfe | 15 | Daughter | — | Iowa |
| 48 | John Wolfe THIS PERSON | 12 | Son | — | Iowa |
| 49 | Kay Ann Wolfe | 7 | Daughter | — | Iowa |
| 50 | Roland Wolfe | 5 | Son | — | Iowa |
| 51 | Leroy E Board | 53 | Head | Farmer | Iowa |
| 52 | Bertha Board | 42 | Wife | — | Iowa |
| 53 | Menzel Marshall Board | 64 | Hired man | Farm Laborer | Iowa |
| 54 | Ambrose Mcdermott | 42 | Head | Farmer | Iowa |
| 55 | Ruth Mcdermott | 37 | Wife | — | Missouri |
| 56 | Joseph Mcdermott | 14 | Son | — | Iowa |
| 57 | Patrick Mcdermott | 9 | Son | — | Iowa |
| 58 | Michael Mcdermott | 8 | Son | — | Iowa |
| 59 | Thomas Mcdermott | 6 | Son | — | Iowa |
| 60 | Anthony Mcdermott | 5 | Son | — | Iowa |
| 61 | Mary Lou Mcdermott | 4 | Daughter | — | Iowa |
| 62 | Helen Ann Mcdermott | 3 | Daughter | — | Iowa |
| 63 | Jerome Mcdermott | 1 | Son | — | Iowa |
| 64 | Herman Weber | 51 | Hired man | Farm Laborer | Iowa |
| 65 | John Leyendecker | 32 | Head | Farmer | Iowa |
| 66 | Irene Leyendecker | 22 | Wife | — | Iowa |
| 67 | Rose Leyendecker | 2 | Daughter | — | Iowa |
| 68 | Marjorie Leyendecker | 1 | Daughter | — | Iowa |
| 69 | John Kessler | 32 | Head | Farmer | Iowa |
| 70 | Eunice Kessler | 30 | Wife | — | Iowa |
| 71 | Joan Kessler | 3 | Daughter | — | Iowa |
| 72 | Margaret Kessler | 0 | Daughter | — | Iowa |
| 73 | Joseph Heims | 65 | Head | Farmer | Iowa |
| 74 | Elizabeth Heims | 54 | Wife | — | Iowa |
| 75 | Edmund Heims | 24 | Son | Farm Laborer | Iowa |
| 76 | Lawrence Heims | 18 | Son | Farm Laborer | Iowa |
| 77 | Delores Heims | 16 | Daughter | — | Iowa |
| 78 | Gilbert Heims | 13 | Son | — | Iowa |
| 79 | Nick Kramer | 54 | Head | Farmer | Iowa |
| 80 | Clara Kramer | 49 | Wife | — | Iowa |
Related Census Records
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)