JF
John Fields — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this John Fields across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 12-person household.
Age 23
b. ~1917
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Fields |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Occupation | Metal Plating |
| Industry | Chromium |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 832 |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Metal Plating |
| Township / Ward | Philadelphia |
| 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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Patsy Fields | Daughter | — | 3 | ~1937 |
| Marietta Fields | Daughter | — | 7 | ~1933 |
| Charles Fields | Head | — | 48 | ~1892 |
| Henry Fields | Son | — | 10 | ~1930 |
| Joseph Fields | Son | — | 9 | ~1931 |
| John Fields | Son | — | 23 | ~1917 |
| Charles Fields | Son | — | 17 | ~1923 |
| Edward Fields | Son | — | 20 | ~1920 |
| Edward Fields | Son | — | 13 | ~1927 |
| Thomas Fields | Son | — | 15 | ~1925 |
| Walter Fields | Son | — | 6 | ~1934 |
| Elizabeth Fields | Spouse | — | 48 | ~1892 |
Census Appearances
1930
Philadelphia, Pennsylvania
Son, age 13
Philadelphia, Pennsylvania · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Field |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Son, age 23
Philadelphia-County, Pennsylvania · implied b. ~1917 — 12 household members
| Surname | Fields |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Occupation | Metal Plating |
| Industry | Chromium |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 832 |
| Highest Grade | G 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 Fields across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Fields
Son · 1940 · age 23 · b. ~1917 · Pennsylvania
★ You are viewing this record
Sibling
Edward Fields
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marietta Fields
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Fields
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Fields
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patsy Fields
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Fields
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Fields
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Fields
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Fields
Sibling · 1940 · age 6
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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03697-00976)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elizabeth Mcknight | 15 | daughter | — | Pennsylvania |
| 42 | John Mcknight | 13 | son | — | Pennsylvania |
| 43 | Lawrence Mcknight | 10 | son | — | Pennsylvania |
| 44 | Charles Mcknight | 9 | son | — | Pennsylvania |
| 45 | Gerald Mcknight | 4 | son | — | Pennsylvania |
| 46 | Judith Mcknight | 0 | daughter | — | Pennsylvania |
| 47 | John Sullivan | 48 | Head | — | Pennsylvania |
| 48 | Florence Sullivan | 43 | Wife | — | Pennsylvania |
| 49 | Joseph Sullivan | 13 | son | — | Pennsylvania |
| 50 | Jackie Sullivan | 11 | son | — | Pennsylvania |
| 51 | George Wichert | 24 | stepson | Utility Man | Pennsylvania |
| 52 | William Wichert | 21 | stepson | Driver | Pennsylvania |
| 54 | Henry Alexander | 50 | Head | Laborer | Russia |
| 55 | Mary Alexander | 50 | Wife | — | Poland |
| 56 | Charles Fields | 48 | Head | Dyer | Pennsylvania |
| 57 | Elizabeth Fields | 48 | Wife | — | Pennsylvania |
| 58 | John Fields THIS PERSON | 23 | son | Metal Plating | Pennsylvania |
| 59 | Edward Fields | 20 | son | Helper | Pennsylvania |
| 60 | Charles Fields | 17 | son | Helper | Pennsylvania |
| 61 | Thomas Fields | 15 | son | — | Pennsylvania |
| 62 | Edward Fields | 13 | son | — | Pennsylvania |
| 63 | Henry Fields | 10 | son | — | Pennsylvania |
| 64 | Joseph Fields | 9 | son | — | Pennsylvania |
| 65 | Marietta Fields | 7 | daughter | — | Pennsylvania |
| 66 | Walter Fields | 6 | son | — | Pennsylvania |
| 67 | Patsy Fields | 3 | daughter | — | Pennsylvania |
| 68 | Samuel J. Wambold | 49 | Head | Carpenter | Pennsylvania |
| 69 | Florence Wambold | 50 | Wife | — | Virginia |
| 70 | Margaret Duppel | 53 | Lodger | — | Pennsylvania |
| 71 | Anthony Enright | 24 | Lodger | Roofer | Pennsylvania |
| 72 | Serena Enright | 23 | Lodger | — | Pennsylvania |
| 73 | George Beaver | 51 | Head | Junk | Pennsylvania |
| 74 | Mary Wilkins | 58 | Wife | — | Pennsylvania |
| 75 | Frederick Rothenbach | 32 | Lodger | Knitter | Pennsylvania |
| 76 | Charles Rothenbach | 39 | Lodger | Knitter | Germany |
| 77 | Hugh Mccaventy | 43 | Lodger | Laborer | Pennsylvania |
| 78 | William White | 52 | Lodger | Waiter | Pennsylvania |
| 79 | Domenick Galdo | 27 | Head | Salesman | Pennsylvania |
| 80 | Marie Galdo | 23 | Wife | — | 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)