MK
Mary Kaufman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Shelby-County, Iowa
Our Model Tree links this Mary Kaufman across the 1930 and 1940 US Censuses in Shelby-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Shelby-County, Iowa |
| Surname | Kaufman |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Grove Township |
| 1935 Residence (County) | Shelby |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Grove Township |
| Est. Birth Year | ~1917 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Michael Kaufman | Son | — | 3 | ~1937 |
| Catherine Kaufman | Daughter | — | 6 | ~1934 |
| Cecelia Kaufman | Head | — | 47 | ~1893 |
| Genevieve Kaufman | Daughter | — | 12 | ~1928 |
| Theresa Kaufman | Daughter | — | 9 | ~1931 |
| Henry Kaufman | Son | — | 19 | ~1921 |
| Mary Kaufman | Daughter | — | 23 | ~1917 |
Census Appearances
1930
Shelby, Iowa
Daughter, age 13
Shelby, Iowa · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kaufman |
| Given Name | Mary D |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| 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
Shelby-County, Iowa
Daughter, age 23
Shelby-County, Iowa · implied b. ~1917 — 7 household members
| Surname | Kaufman |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Grove Township |
| 1935 Residence (County) | Shelby |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 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 Mary Kaufman across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kaufman
Daughter · 1940 · age 23 · b. ~1917 · Iowa
★ You are viewing this record
Sibling
Henry Kaufman
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Kaufman
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Genevieve Kaufman
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Kaufman
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Kaufman
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 — Shelby-County, Iowa
Open full size
1940 US Federal Census — Shelby-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01204-00152)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur Masters | 26 | Son | Farm Laborer | Iowa |
| 2 | Elizabeth Masters | 22 | Daughter | Housekeeper | Iowa |
| 3 | Cecelia A. Kaufman | 47 | Head | — | Iowa |
| 4 | Mary Kaufman THIS PERSON | 23 | Daughter | — | Iowa |
| 5 | Henry Kaufman | 19 | Son | Farm Laborer | Iowa |
| 6 | Genevieve (Ab) Kaufman | 12 | Daughter | — | Iowa |
| 7 | Theresa (Ab) Kaufman | 9 | Daughter | — | Iowa |
| 8 | Catherine Kaufman | 6 | Daughter | — | Iowa |
| 9 | Michael Kaufman | 3 | Son | — | Iowa |
| 10 | George H. Stolz | 51 | Head | Farmer | Iowa |
| 11 | Vera Stolz | 49 | Wife | — | Iowa |
| 12 | Ronaldus Stolz | 30 | Son | — | Iowa |
| 13 | Allen Stolz | 24 | Son | Farm Laborer | Iowa |
| 14 | Lois Stolz | 20 | Daughter | Housekeeper | Iowa |
| 15 | Louis Stolz | 16 | Son | Farm Laborer | Iowa |
| 16 | George Stolz | 14 | Son | Farm Laborer | Iowa |
| 17 | Thelma Stolz | 13 | Daughter | — | Iowa |
| 18 | Roman Stolz | 9 | Son | — | Iowa |
| 19 | Albert O. Anderson | 27 | Head | Farmer | Iowa |
| 20 | Dorothy Anderson | 23 | Wife | — | Iowa |
| 21 | Pauline Anderson | 2 | Daughter | — | Iowa |
| 22 | Robert Anderson | 0 | Son | — | Iowa |
| 23 | Anna Schmitz | 24 | Hired Hand | Farm Laborer | Iowa |
| 24 | Anna Schultz | 74 | Head | Manager | Germany |
| 25 | Frank O. Schultz | 41 | Son | Farm Laborer | Iowa |
| 26 | Roman Schmitz | 23 | Hired Hand | Farm Laborer | Iowa |
| 27 | Grace Leus | 22 | Maid | Housekeeper | Iowa |
| 28 | Edward E. Eulbacker | 29 | Head | Farmer | Iowa |
| 29 | Magdalen Eulbacker | 27 | Wife | — | Iowa |
| 30 | Elaine Eulbacker | 4 | Daughter | — | Iowa |
| 31 | Janice Eulbacker | 2 | Daughter | — | Iowa |
| 32 | Phyllis Eulbacker | 0 | Daughter | — | Iowa |
| 33 | Henry Schram | 30 | Hired Hand | Farm Laborer | Iowa |
| 34 | Emil O. Gross | 27 | Head | Farmer | Iowa |
| 35 | Agnesita Gross | 20 | Wife | — | Iowa |
| 36 | Patricia Gross | 1 | Daughter | — | Iowa |
| 37 | Janella Gross | 0 | Daughter | — | Iowa |
| 38 | Raymond O. Graeve | 26 | Head | Farmer | Iowa |
| 39 | Alida Graeve | 25 | Wife | — | Iowa |
| 40 | Alfons J. Klein | 31 | Head | Farmer | 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)