MJ
Mary Johns — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Johns across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1896), then head of a 7-person household.
Age 44
b. ~1896
Female
Head
Born: England
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Johns |
| Given Name | Mary Jane |
| Relationship to Head | head |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Pennsylvania |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1896 |
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 |
|---|---|---|---|---|
| Charles Johns | Son | — | 24 | ~1916 |
| Robert Johns | Son | — | 12 | ~1928 |
| Dorothy Johns | Daughter | — | 19 | ~1921 |
| Mary Johns | Head | — | 44 | ~1896 |
| David Johns | Son | — | 10 | ~1930 |
| Clarence Johns | Son | — | 18 | ~1922 |
| Ruth Johns | Daughter | — | 6 | ~1934 |
Census Appearances
1930
Allegheny, Pennsylvania
Other, age 33
Allegheny, Pennsylvania · implied b. ~1897 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johns |
| Given Name | Mary J. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1907 |
| Age at First Marriage | 19 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Allegheny-County, Pennsylvania
Head, age 44
Allegheny-County, Pennsylvania · implied b. ~1896 — 7 household members
| Surname | Johns |
| Given Name | Mary Jane |
| Relationship to Head | head |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Pennsylvania |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Johns across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Johns
Head · 1940 · age 44 · b. ~1896 · 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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03411-00172)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Danella Sullivan | 21 | daughter | Filing Clerk | Pennsylvania |
| 42 | Mary Jane Miller | 19 | daughter | Filing Clerk | Pennsylvania |
| 43 | Josephine Nehringer | 46 | head | — | Pennsylvania |
| 44 | George Nehringer | 20 | son | Clerk | Pennsylvania |
| 45 | Kenneth Nehringer | 18 | son | Truck Driver | Pennsylvania |
| 46 | Laverne Nehringer | 14 | son | — | Pennsylvania |
| 47 | Louis Kalarji | 55 | head | Stone Cutter | Syria |
| 48 | Rose Kalarji | 48 | wife | — | Pennsylvania |
| 49 | Walter Kleespies | 36 | head | Truck Driver | Pennsylvania |
| 50 | Minnie Kleespies | 33 | wife | — | Pennsylvania |
| 51 | John Normand | 30 | head | Apprentice | Pennsylvania |
| 52 | Viola Normand | 30 | wife | — | Pennsylvania |
| 53 | Janice Normand | 2 | daughter | — | Pennsylvania |
| 54 | Nancy Lee Normand | 0 | daughter | — | Pennsylvania |
| 55 | Joseph Lister | 44 | head | Jewelry Salesman | Austria |
| 56 | Lillian Lister | 38 | wife | — | Pennsylvania |
| 57 | Lillian Lister | 6 | daughter | — | Pennsylvania |
| 58 | Mary Ann Lister | 3 | daughter | — | Pennsylvania |
| 59 | Paul J. Jarrett | 44 | head | Automobile Mechanic | Pennsylvania |
| 60 | Catherine Jarrett | 45 | wife | — | Pennsylvania |
| 61 | Walter Hoellman | 34 | head | Guard | Pennsylvania |
| 62 | Evelyn Hoellman | 32 | wife | — | Pennsylvania |
| 63 | Charles Gerlach | 16 | step son | — | Pennsylvania |
| 64 | Evelyn Gerlach | 13 | step daughter | — | Pennsylvania |
| 65 | Louis Pfaff | 66 | head | Printer | Pennsylvania |
| 66 | Bertha Pfaff | 66 | wife | — | Pennsylvania |
| 67 | Christ Pfaff | 55 | brother | Laborer | Pennsylvania |
| 68 | Mary Jane Johns THIS PERSON | 44 | head | — | England |
| 69 | Charles Johns | 24 | son | Storeroom Clerk | Pennsylvania |
| 70 | Dorothy Johns | 19 | daughter | Bookkeeper | Honolulu |
| 71 | Clarence Johns | 18 | son | New Worker | Honolulu |
| 72 | Robert Johns | 12 | son | — | Pennsylvania |
| 73 | David Johns | 10 | son | — | Pennsylvania |
| 74 | Ruth Johns | 6 | daughter | — | Pennsylvania |
| 75 | George Abend | 57 | head | Bartender | Pennsylvania |
| 76 | Rose Abend | 51 | wife | — | Pennsylvania |
| 77 | George Abend | 27 | son | Milk Man | Pennsylvania |
| 78 | Marcella Abend | 26 | daughter | — | Pennsylvania |
| 79 | Dorothy Abend | 23 | daughter | — | Pennsylvania |
| 80 | Rita Abend | 20 | daughter | 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)