JF
John Foster — 1940 US Census Record
Model Tree available1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this John Foster across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & Abby — first a head (b.~1906), then head of a 6-person household.
Age 34
b. ~1906
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Foster |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Occupation | Machinist |
| Industry | Ball bearing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Machinist |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1906 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Madeline Foster | Daughter | — | 5 | ~1935 |
| Margaret Foster | Daughter | — | 7 | ~1933 |
| John Foster | Head | — | 34 | ~1906 |
| Joseph Ruhl | Other | — | 23 | ~1917 |
| John Foster | Son | — | 10 | ~1930 |
| Elizabeth Foster | Spouse | — | 36 | ~1904 |
Census Appearances
1920
Philadelphia, Pennsylvania
Son, age 14
Philadelphia, Pennsylvania · implied b. ~1906 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Philadelphia, Pennsylvania
Son, age 25
Philadelphia, Pennsylvania · implied b. ~1905 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk |
| Industry | Steam RR |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Head, age 34
Philadelphia-County, Pennsylvania · implied b. ~1906 — 6 household members
| Surname | Foster |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Occupation | Machinist |
| Industry | Ball bearing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 John Foster across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Foster (~0.92 confidence) and mother Abby Foster (~0.92 confidence) and mother Margaret Foster (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Foster
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Abby Foster
b. ~1868
Source mother
● Household
· direct · ~0.92
Mother
Margaret Foster
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Foster
Head · 1940 · age 34 · b. ~1906 · Pennsylvania
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03721-00356)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph L. Harris | 53 | Head | Inspector | Pennsylvania |
| 2 | Alice Harris | 50 | Wife | — | Pennsylvania |
| 3 | John D. Harris | 23 | Son | Printer | Pennsylvania |
| 4 | James Harris | 23 | Son | Knitter'S Helper | Pennsylvania |
| 5 | Thomas Corbett | 40 | Brother in law | Stevedore | Pennsylvania |
| 6 | Thomas Callander | 63 | Head | Stone Fitter | Scotland |
| 7 | John Callander | 30 | Son | Radio Worker | Pennsylvania |
| 8 | Anna Callander | 28 | Daughter | — | Pennsylvania |
| 9 | John Jr. Callander | 0 | Grandson | — | Pennsylvania |
| 10 | Robert Smyth | 36 | Head | Shipwright | Scotland |
| 11 | Gertrude Smyth | 26 | Wife | — | Pennsylvania |
| 12 | Joseph Smyth | 0 | Son | — | Pennsylvania |
| 13 | Walter Spiecker | 35 | Head | Salesman | Pennsylvania |
| 14 | Edith Spiecker | 23 | Wife | Secretary | Pennsylvania |
| 15 | Joseph Wardle | 39 | Head | Electric Welder | England |
| 16 | Christina Wardle | 38 | Wife | — | Scotland |
| 17 | Eric L. Wardle | 17 | Son | — | England |
| 18 | Raymond Volz | 23 | Head | Printer | Pennsylvania |
| 19 | Evelyn Volz | 20 | Wife | Mender | Pennsylvania |
| 20 | Christian Feuerlein | 35 | Head | House Painter | Germany |
| 21 | Louise Feuerlein | 34 | Wife | — | Germany |
| 22 | Charlotte Feuerlein | 7 | Daughter | — | Pennsylvania |
| 23 | John Feuerlein | 5 | Son | — | Pennsylvania |
| 24 | Wilhelmina Feuerlein | 3 | Daughter | — | Pennsylvania |
| 25 | John H. Foster THIS PERSON | 34 | Head | Machinist | Pennsylvania |
| 26 | Elizabeth Foster | 36 | Wife | — | Pennsylvania |
| 27 | John Jr. Foster | 10 | Son | — | Pennsylvania |
| 28 | Margaret Foster | 7 | Daughter | — | Pennsylvania |
| 29 | Madeline Foster | 5 | Daughter | — | Pennsylvania |
| 30 | Joseph Ruhl | 23 | Brother in law | Apprentice In Machine Shop | Pennsylvania |
| 31 | William King | 63 | Head | Textile Worker | England |
| 32 | Rose C. Allen | 52 | Housekeeper | Housekeeper | Pennsylvania |
| 33 | Samuel Mcmillan | 61 | Head | Handyman | Northern Ireland |
| 34 | Elizabeth Mcmillan | 54 | Wife | — | Ireland |
| 35 | Samuel Mcmillan | 22 | Son | Night Watchman | Pennsylvania |
| 36 | Rudolph Ziegelmaier | 34 | Head | Yard Man | Germany |
| 37 | Clara Ziegelmaier | 34 | Wife | — | Germany |
| 38 | Clara Ziegelmaier | 2 | Daughter | — | Pennsylvania |
| 39 | Martin Wolf | 43 | Head | Floor Finisher | Pennsylvania |
| 40 | Catherine Wolf | 43 | Wife | Topper | Pennsylvania |
Related Census Records
Pedigree Summary
John
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)