WS
William Shaffer — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Dubuque, Iowa
Our Model Tree links this William Shaffer across the 1930 and 1940 US Censuses in Dubuque, Iowa (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 11-person household.
Age 9
b. ~1921
Male
Son
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Dubuque, Iowa |
| Surname | Shaffer |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Cascade Part Of |
| Est. Birth Year | ~1921 |
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.
11 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Aurelia Shaffer | Daughter | — | 20 | ~1910 |
| William Shaffer | Head | — | 49 | ~1881 |
| William Shaffer | Son | — | 9 | ~1921 |
| Bernice Shaffer | Daughter | — | 7 | ~1923 |
| Lawrence Shaffer | Son | — | 17 | ~1913 |
| Teresa Shaffer | Spouse | — | 45 | ~1885 |
| Mary Shaffer | Daughter | — | 11 | ~1919 |
| Leo Shaffer | Son | — | 13 | ~1917 |
| Margaret Shaffer | Daughter | — | 18 | ~1912 |
| Clara Shaffer | Daughter | — | 15 | ~1915 |
| Mildred Shaffer | Daughter | — | 4 | ~1926 |
Census Appearances
1930
Dubuque, Iowa
Son, age 9
Dubuque, Iowa · implied b. ~1921 — 11 household members
| Surname | Shaffer |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dubuque-County, Iowa
Son, age 19
Dubuque-County, Iowa · implied b. ~1921 — 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 | 19 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Worthington |
| 1935 Residence (County) | Dubuque |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 78 |
| Income (1939) | 888 |
| Highest Grade | Hs 4 |
| 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 Shaffer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Shaffer
Son · 1930 · age 9 · b. ~1921 · Iowa
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Sibling
Margaret Shaffer
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Shaffer
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leo Shaffer
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Shaffer
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clara Shaffer
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Aurelia Shaffer
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Shaffer
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Shaffer
Sibling · 1930 · age 11
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
1930 US Federal Census — Dubuque, Iowa
Open full size
1930 US Federal Census — Dubuque, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel653:0606)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Harlo Gearhart | 26 | Head | Farmer | Iowa |
| 52 | Henry Gearhart | 58 | Head | Farmer | Iowa |
| 53 | Magdalina Gearhart | 56 | Wife | — | Iowa |
| 54 | Richard Gearhart | 26 | Son | Laborer | Iowa |
| 55 | Alphonse Gearhart | 24 | Son | Laborer | Iowa |
| 56 | Ingrid Gearhart | 22 | Son | Laborer | Iowa |
| 57 | Gertrude Gearhart | 20 | Daughter | — | Iowa |
| 58 | Alfred Gearhart | 18 | Son | — | Iowa |
| 59 | Clarence Gearhart | 16 | Son | — | Iowa |
| 60 | Mary Gearhart | 12 | Daughter | — | Iowa |
| 61 | Kate Lenhoff | 50 | Head | Farmer | Iowa |
| 62 | Anton Lenhoff | 25 | Son | Laborer | Iowa |
| 63 | Amanda Lenhoff | 15 | Daughter | — | Iowa |
| 64 | William Evange | 30 | Boarder | Laborer | England |
| 65 | Walter Gearhart | 30 | Head | Laborer | Iowa |
| 66 | Marie Gearhart | 28 | Wife | — | Iowa |
| 67 | Junior Gearhart | 8 | Son | — | Iowa |
| 68 | Gerald Gearhart | 5 | Son | — | Iowa |
| 69 | Harold J. Gearhart | 3 | Son | — | Iowa |
| 70 | Frank J. Doyle | 51 | Head | Farmer | Iowa |
| 71 | Mae Doyle | 45 | Wife | — | Iowa |
| 72 | Frank Jr. Doyle | 14 | Son | — | Iowa |
| 73 | Bernadine Doyle | 13 | Daughter | — | Iowa |
| 74 | Robert A. Doyle | 9 | Son | — | Iowa |
| 75 | Raymond Doyle | 5 | Son | — | Iowa |
| 76 | William Shaffer | 49 | Head | Farmer | Iowa |
| 77 | Teresa Shaffer | 45 | Wife | — | Iowa |
| 78 | Aurelia Shaffer | 20 | Daughter | — | Iowa |
| 79 | Margaret Shaffer | 18 | Daughter | — | Iowa |
| 80 | Lawrence A. Shaffer | 17 | Son | — | Iowa |
| 81 | Clara Shaffer | 15 | Daughter | — | Iowa |
| 82 | Leo Shaffer | 13 | Son | — | Iowa |
| 83 | Mary Shaffer | 11 | Daughter | — | Iowa |
| 84 | William Jr. Shaffer THIS PERSON | 9 | Son | — | Iowa |
| 85 | Bernice Shaffer | 7 | Daughter | — | Iowa |
| 86 | Mildred Shaffer | 4 | Daughter | — | Iowa |
| 87 | John V. Becker | 49 | Head | Farmer | Iowa |
| 88 | Clara Becker | 46 | Wife | — | Iowa |
| 89 | Reynold Becker | 18 | Son | Laborer | Iowa |
| 90 | Alphonse Becker | 16 | Son | — | Iowa |
| 91 | Leo J. Becker | 12 | Son | — | Iowa |
| 92 | Margaret J. Becker | 8 | Daughter | — | Iowa |
| 93 | James Tobin | 55 | Head | Farmer | Iowa |
| 94 | Margaret Tobin | 40 | Wife | — | Iowa |
| 95 | William Tobin | 5 | Son | — | Iowa |
| 96 | Marcella Snyder | 22 | Daughter | Servant | Iowa |
| 97 | Bernice Snyder | 19 | Daughter | Servant | Iowa |
| 98 | Florence Snyder | 18 | Daughter | Servant | Iowa |
| 99 | Eleanor Snyder | 16 | Daughter | — | Iowa |
| 100 | Lucille Snyder | 14 | Daughter | — | Iowa |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)