MK
Mary Kaufman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Northampton-County, Pennsylvania
Our Model Tree links this Mary Kaufman across the 1930 and 1940 US Censuses in Northampton-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1907), then head of a 7-person household.
Age 33
b. ~1907
Female
Spouse
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Northampton-County, Pennsylvania |
| Surname | Kaufman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Bethlehem city |
| 1935 Residence (County) | Northampton |
| Additional Details | |
| Occupation | wrapper |
| Industry | Silk mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 768 |
| Highest Grade | 6 |
| 1935 Residence | Same home |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Wrapper |
| Township / Ward | Bethlehem City |
| Est. Birth Year | ~1907 |
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 |
|---|---|---|---|---|
| Vincent Kaufman | Son | — | 6 | ~1934 |
| Richard Kaufman | Son | — | 4 | ~1936 |
| Robert Kaufman | Son | — | 7 | ~1933 |
| Emil Kaufman | Son | — | 10 | ~1930 |
| Emil Kaufman | Head | — | 30 | ~1910 |
| Marie Kaufman | Daughter | — | 9 | ~1931 |
| Mary Kaufman | Spouse | — | 33 | ~1907 |
Census Appearances
1930
Lehigh, Pennsylvania
Spouse, age 23
Lehigh, Pennsylvania · implied b. ~1907 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kaufmann |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 23 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Northampton-County, Pennsylvania
Spouse, age 33
Northampton-County, Pennsylvania · implied b. ~1907 — 7 household members
| Surname | Kaufman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Bethlehem city |
| 1935 Residence (County) | Northampton |
| Occupation | wrapper |
| Industry | Silk mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 768 |
| Highest Grade | 6 |
| 1935 Residence | Same home |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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.
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This person
Anchor record
Mary Kaufman
Spouse · 1940 · age 33 · b. ~1907 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Northampton-County, Pennsylvania
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1940 US Federal Census — Northampton-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03588-00313)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Szabo | 44 | Head | Truck Driver | Pennsylvania |
| 2 | Helen Szabo | 35 | Wife | — | Pennsylvania |
| 3 | Leonarda Szabo | 15 | Daughter | — | Pennsylvania |
| 4 | William Szabo | 9 | Son | — | Pennsylvania |
| 5 | Joseph Szabo | 8 | Son | — | Pennsylvania |
| 6 | Robert Szabo | 3 | Son | — | Pennsylvania |
| 7 | Thomas Michael | 32 | Head | Bricklayer | Pennsylvania |
| 8 | Margaret Michael | 31 | Wife | — | Pennsylvania |
| 9 | Lorraine Michael | 13 | Daughter | — | Pennsylvania |
| 10 | Margaret Michael | 12 | Daughter | — | Pennsylvania |
| 11 | Thomas Michael | 10 | Son | — | Pennsylvania |
| 12 | Frederick Steers | 30 | Lodger | Truck Driver | Pennsylvania |
| 13 | Jeanette Steers | 16 | Lodger | — | Pennsylvania |
| 14 | Emil Kaufman | 30 | Head | Laborer | Pennsylvania |
| 15 | Mary Kaufman THIS PERSON | 33 | Wife | Wrapper | Pennsylvania |
| 16 | Emil Kaufman | 10 | Son | — | Pennsylvania |
| 17 | Marie Kaufman | 9 | Daughter | — | Pennsylvania |
| 18 | Robert Kaufman | 7 | Son | — | Pennsylvania |
| 19 | Vincent Kaufman | 6 | Son | — | Pennsylvania |
| 20 | Richard Kaufman | 4 | Son | — | Pennsylvania |
| 21 | Roland Bauer | 46 | Head | Laborer | Pennsylvania |
| 22 | Claire Bauer | 42 | Wife | — | Pennsylvania |
| 23 | Merritt Bauer | 25 | Son | Redrawing | Pennsylvania |
| 24 | Kenneth Bauer | 21 | Son | Apprentice | Pennsylvania |
| 25 | Russell Bauer | 16 | Son | — | Pennsylvania |
| 26 | Aglin Adams | 25 | Head | Stamper | Pennsylvania |
| 27 | Evelyn Adams | 23 | Wife | — | Pennsylvania |
| 28 | Richard Adams | 1 | Son | — | Pennsylvania |
| 29 | Carl Jacoby | 26 | Lodger | Chairman | Pennsylvania |
| 30 | Russell Rowe | 37 | Head | Laborer | Pennsylvania |
| 31 | Dorothy Rowe | 35 | Wife | — | Pennsylvania |
| 32 | Russell Rowe | 14 | Son | — | Pennsylvania |
| 33 | Richard Rowe | 5 | Son | — | Pennsylvania |
| 34 | Charles Renz | 63 | Father-in-law | Janitor | Pennsylvania |
| 35 | John Gottwald | 36 | Head | Plumber | Pennsylvania |
| 36 | Agnes Gottwald | 36 | Wife | Redrawing | Pennsylvania |
| 37 | George Sider | 41 | Head | Investigator | Pennsylvania |
| 38 | Gertrude Sider | 42 | Wife | — | Pennsylvania |
| 39 | Mary Sider | 20 | Daughter | Shearer | Pennsylvania |
| 40 | Leonard Sider | 17 | Son | New Worker | Pennsylvania |
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)