JF
John Foster — 1940 US Census Record
Linked across censuses1940 United States Federal Census · New-Castle-County, Delaware
Our Model Tree links this John Foster across the 1930 and 1940 US Censuses in New-Castle-County, Delaware (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 12-person household.
Age 51
b. ~1889
Male
Head
Born: Delaware
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | New-Castle-County, Delaware |
| Surname | Foster |
| Given Name | John M. B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | New Castle City |
| 1935 Residence (County) | New Castle |
| Additional Details | |
| Occupation | Engine driver |
| Industry | Fire Co |
| Class of Worker | PW |
| Hours Worked | 98 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
| Occupation | Engine Driver |
| Township / Ward | New Castle City |
| Est. Birth Year | ~1889 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Eva Foster | Daughter | — | 22 | ~1918 |
| Mary Foster | Daughter | — | 20 | ~1920 |
| Margaret Foster | Daughter | — | 17 | ~1923 |
| Katherine Foster | Daughter | — | 8 | ~1932 |
| Jane Foster | Daughter | — | 4 | ~1936 |
| John Foster | Head | — | 51 | ~1889 |
| James Foster | Other | — | 81 | ~1859 |
| Joseph Foster | Son | — | 12 | ~1928 |
| Francis Foster | Son | — | 24 | ~1916 |
| Roland Foster | Son | — | 10 | ~1930 |
| Price Foster | Son | — | 13 | ~1927 |
| Eva Foster | Spouse | — | 48 | ~1892 |
Census Appearances
1930
New Castle, …
Head, age 46
New Castle, Delaware · implied b. ~1884 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Delaware |
| Age at First Marriage | 25 |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Occupation | Foreman |
| Industry | Cotton Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 35 |
| Radio Set | R |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1940
New-Castle-County, Delaware
Head, age 51
New-Castle-County, Delaware · implied b. ~1889 — 12 household members
| Surname | Foster |
| Given Name | John M. B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | New Castle City |
| 1935 Residence (County) | New Castle |
| Occupation | Engine driver |
| Industry | Fire Co |
| Class of Worker | PW |
| Hours Worked | 98 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Foster
Head · 1940 · age 51 · b. ~1889 · Delaware
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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 — New-Castle-County, Delaware
Open full size
1940 US Federal Census — New-Castle-County, Delaware
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00546-00358)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jane Van Veen | 11 | Daughter | — | Delaware |
| 2 | John S. Landa | 39 | Head | Chemist | New York |
| 3 | Marion A. Landa | 40 | Wife | — | New York |
| 4 | Elizabeth A. Landa | 8 | Daughter | — | New York |
| 5 | Mary B. Mcpike | 66 | Head | — | Delaware |
| 6 | Agnes Duncan | 23 | Aunt | — | Delaware |
| 7 | Margaret Duncan | 80 | Aunt | — | Delaware |
| 8 | Rudolph H. Vallette | 70 | Head | — | Pennsylvania |
| 9 | John M. B. Foster THIS PERSON | 51 | Head | Engine Driver | Delaware |
| 10 | Eva C. Foster | 48 | Wife | — | Delaware |
| 11 | Francis L. Foster | 24 | Son | — | Delaware |
| 12 | Eva Foster | 22 | Daughter | — | Delaware |
| 13 | Mary Foster | 20 | Daughter | Sell Tickets | Delaware |
| 14 | Margaret Foster | 17 | Daughter | — | Delaware |
| 15 | Price Foster | 13 | Son | — | Delaware |
| 16 | Joseph Foster | 12 | Son | — | Delaware |
| 17 | Roland Foster | 10 | Son | — | Delaware |
| 18 | Katherine Foster | 8 | Daughter | — | Delaware |
| 19 | Jane Foster | 4 | Daughter | — | Delaware |
| 20 | James W. Foster | 81 | Father | — | Delaware |
| 21 | Rodney Willis | 37 | Head | Patternmaker | Delaware |
| 22 | Elizabeth Willis | 35 | Wife | — | Delaware |
| 23 | Rodney Willis | 17 | Son | — | Delaware |
| 24 | Charles Willis | 15 | Son | — | Delaware |
| 25 | Jane Mccaughan | 70 | Head | — | Delaware |
| 26 | Margaret Mccaughan | 66 | Sister | — | Delaware |
| 27 | Catherine Williams | 82 | Head | — | Delaware |
| 28 | Clayton Wright | 46 | Head | Porter | Maryland |
| 29 | Lula Wright | 47 | Wife | Maid | Maryland |
| 30 | Walter Sibley | 28 | Head | Store Clerk | Delaware |
| 31 | Myrtle Sibley | 21 | Wife | — | Delaware |
| 32 | Frank Proud | 42 | Head | Patternmaker | Delaware |
| 33 | Frances Proud | 40 | Wife | — | Delaware |
| 34 | Francis M. Proud | 20 | Daughter | Clerk | Delaware |
| 35 | William F. Proud | 18 | Son | — | Delaware |
| 36 | Margaret A. Proud | 16 | Daughter | — | Delaware |
| 37 | Mary E. Proud | 11 | Daughter | — | Delaware |
| 38 | L. Eugene Chase | 56 | Head | Bailiff | Delaware |
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)