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John Kaufman — 1930 US Census Record
Model Tree available1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this John Kaufman across the 1920, 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed), with identified parents Frank & Frederick — first a son (b.~1920), then head of a 5-person household.
Age 10
b. ~1920
Male
Son
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Kaufman |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1920 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Paul Kaufman | Head | — | 34 | ~1896 |
| John Kaufman | Son | — | 10 | ~1920 |
| Edward Kaufman | Son | — | 8 | ~1922 |
| Margaret Kaufman | Daughter | — | 12 | ~1918 |
| Minnie Kaufman | Spouse | — | 32 | ~1898 |
Census Appearances
1920
Baltimore, Maryland
Son, age
Baltimore, Maryland · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kaufman |
| Given Name | John J. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 10
Baltimore, Maryland · implied b. ~1920 — 5 household members
| Surname | Kaufman |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Son, age 20
Baltimore-City-County, Maryland · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kauffman |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Beverage Handler |
| Industry | Bottle Caps Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 900 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Kaufman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Kauffman (~0.92 confidence) and father Frederick Kaufman (~0.92 confidence) and father Paul Kaufman (~0.92 confidence) and mother Florence Kauffman (~0.92 confidence) and mother Leona Kaufman (~0.92 confidence) and mother Minnie Kaufman (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Kauffman
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Frederick Kaufman
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Paul Kaufman
b. ~1896
Source father
● Household
· direct · ~0.92
Mother
Florence Kauffman
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Leona Kaufman
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Minnie Kaufman
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Kaufman
Son · 1930 · age 10 · b. ~1920 · Maryland
★ You are viewing this record
Sibling
Edward Kaufman
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Kaufman
Sibling · 1930 · age 12
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 — Baltimore, Maryland
Open full size
1930 US Federal Census — Baltimore, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus851unit:0771)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Brown | 45 | Head | Salesman | Maryland |
| 2 | Margaret Brown | 42 | Wife | — | Maryland |
| 3 | Frank Brown | 14 | Son | — | Maryland |
| 4 | William Brown | 12 | Son | — | Maryland |
| 5 | Elizabeth Brown | 9 | Daughter | — | Maryland |
| 6 | James Brown | 7 | Son | — | Maryland |
| 7 | Anna Brown | 4 | Daughter | — | Maryland |
| 8 | Victor Monarski | 32 | Head | Agent | Maryland |
| 9 | Katherine Monarski | 30 | Wife | — | Maryland |
| 10 | Victor Jr. Monarski | 3 | Son | — | Maryland |
| 11 | Paul Kaufman | 34 | Head | Woodworker | Maryland |
| 12 | Minnie Kaufman | 32 | Wife | — | Maryland |
| 13 | Margaret Kaufman | 12 | Daughter | — | Maryland |
| 14 | John Kaufman THIS PERSON | 10 | Son | — | Maryland |
| 15 | Edward Kaufman | 8 | Son | — | Maryland |
| 16 | John Slinek | 58 | Head | Post-Shop | Czecho-Slovakia |
| 17 | Antoinette Slinek | 43 | Wife | — | Czecho-Slovakia |
| 18 | Jessie Slinek | 14 | Daughter | Handbag | Maryland |
| 19 | Agnes Slinek | 12 | Daughter | Book Binder | Maryland |
| 20 | Olga Slinek | 15 | Daughter | — | Maryland |
| 21 | John Slinek | 12 | Son | — | Maryland |
| 22 | Mildred Slinek | 9 | Daughter | — | Maryland |
| 23 | John Cherny | 40 | Boarder | Cabinet Maker | Czecho-Slovakia |
| 24 | Elmer Mcabree | 33 | Head | — | Maryland |
| 25 | Charles Mcabree | 13 | Son | — | Maryland |
| 26 | Albert Mcabree | 10 | Son | — | Maryland |
| 27 | Charles Fowler | 37 | Boarder | Inspector | Maryland |
| 28 | Cyril Bloodsworth | 28 | Boarder | Taxi-Driver | Maryland |
| 29 | George Thomas | 53 | Boarder | Night Shift | Maryland |
| 30 | John Nelson | 22 | Boarder | — | South Carolina |
| 31 | Frank Ducek | 39 | Head | Machinist | Czecho-Slovakia |
| 32 | Anna Ducek | 40 | Wife | — | Czecho-Slovakia |
| 33 | Anna Ducek | 16 | Daughter | — | Maryland |
| 34 | Lillian Ducek | 14 | Daughter | — | Maryland |
| 35 | Frank Tealholme | 30 | Head | Collector | Maryland |
| 36 | Mildred Tealholme | 26 | Wife | — | Maryland |
| 37 | Ruth Tealholme | 4 | Daughter | — | Maryland |
| 38 | Richard Ensor | 53 | Head | Instalator | Maryland |
| 39 | Edith Ensor | 43 | Wife | — | Maryland |
| 40 | Mary Wilson | 40 | Head | — | Maryland |
| 41 | Alfred Wilson | 22 | Son | Musician | Maryland |
| 42 | Avery England | 47 | Boarder | Sailor | Maryland |
| 43 | William Wooten | 57 | Boarder | Street-Cleaner | Maryland |
| 44 | William Curen | 27 | Boarder | Musician | Massachusetts |
| 45 | Johanna Mashone | 53 | Head | Operator | Germany |
| 46 | Elizabeth Rankin | 71 | Mother | — | Germany |
| 47 | Angeline Mashone | 21 | Daughter | Service-Man | Maryland |
| 48 | George Flemer | 29 | Head | Machinist | Maryland |
| 49 | Josephine Flemer | 28 | Wife | — | Czecho-Slovakia |
| 50 | John Flemer | 4 | Son | — | Maryland |
Pedigree Summary
John + 2 siblings
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
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)