MJ
Mary John — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Columbia-County, Pennsylvania
Our Model Tree links this Mary John across the 1930 and 1940 US Censuses in Columbia-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 10-person household.
Age 11
b. ~1929
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Columbia-County, Pennsylvania |
| Surname | John |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Catawissa Borough |
| 1935 Residence (County) | Columbia |
| Additional Details | |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Catawissa Borough |
| Est. Birth Year | ~1929 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary John | Spouse | — | 39 | ~1901 |
| Mary John | Daughter | — | 11 | ~1929 |
| Paul John | Head | — | 39 | ~1901 |
| Lois John | Daughter | — | 1 | ~1939 |
| Paul John | Son | — | 13 | ~1927 |
| Roland John | Son | — | 8 | ~1932 |
| Louella John | Daughter | — | 19 | ~1921 |
| Ruth John | Daughter | — | 15 | ~1925 |
| Wayne John | Son | — | 4 | ~1936 |
| Gerald John | Son | — | 6 | ~1934 |
Census Appearances
1930
Columbia, Pennsylvania
Daughter, age 1
Columbia, Pennsylvania · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | John |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Columbia-County, Pennsylvania
Daughter, age 11
Columbia-County, Pennsylvania · implied b. ~1929 — 10 household members
| Surname | John |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Catawissa Borough |
| 1935 Residence (County) | Columbia |
| Highest Grade | 5 |
| 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 Mary John across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary John
Daughter · 1940 · age 11 · b. ~1929 · Pennsylvania
★ You are viewing this record
Sibling
Lois John
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wayne John
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roland John
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul John
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald John
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louella John
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth John
Sibling · 1940 · age 15
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 — Columbia-County, Pennsylvania
Open full size
1940 US Federal Census — Columbia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03474-00026)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dorothy | 28 | Wife | — | Pennsylvania |
| 2 | Barbara | 6 | Daughter | — | Pennsylvania |
| 3 | Paul F. John | 39 | Head | Stationary Railroad | Pennsylvania |
| 4 | Mary John | 39 | Wife | — | Pennsylvania |
| 5 | Louella John | 19 | Daughter | — | Pennsylvania |
| 6 | Ruth John | 15 | Daughter | — | Pennsylvania |
| 7 | Paul John | 13 | Son | — | Pennsylvania |
| 8 | Mary L. John THIS PERSON | 11 | Daughter | — | Pennsylvania |
| 9 | Roland John | 8 | Son | — | Pennsylvania |
| 10 | Gerald John | 6 | Son | — | Pennsylvania |
| 11 | Wayne John | 4 | Son | — | Pennsylvania |
| 12 | Lois J. John | 1 | Daughter | — | Pennsylvania |
| 13 | Francis D. Matthews | 57 | Head | Pressman | England |
| 14 | Nellie H. Matthews | 57 | Wife | — | Pennsylvania |
| 15 | Harder, Ray Matthews | 39 | Son-in-law | Locomotive Engineer | Pennsylvania |
| 16 | Wesley F. Adams | 63 | Head | 78 | Pennsylvania |
| 17 | Ethel D. Adams | 44 | Daughter | Looper | Pennsylvania |
| 18 | Olive D. Adams | 35 | Daughter | Waitress | Pennsylvania |
| 19 | Harry O. Lindemuth | 43 | Head | Foreman Stock Clerk | Pennsylvania |
| 20 | Frances Lindemuth | 40 | Wife | — | Pennsylvania |
| 21 | Dean Lindemuth | 16 | Son | — | Pennsylvania |
| 22 | Sue Lindemuth | 7 | Daughter | — | Pennsylvania |
| 23 | Emanuel Singley | 48 | Head | Conductor | Pennsylvania |
| 24 | Bessie Singley | 44 | Wife | — | Pennsylvania |
| 25 | William Singley | 27 | Son | Cloth Inspector | Pennsylvania |
| 26 | Alma Singley | 19 | Daughter | Sewing Machine | Pennsylvania |
| 27 | Nellie Singley | 16 | Daughter | — | Pennsylvania |
| 28 | Harry J. Billow | 52 | Head | Clergyman | Pennsylvania |
| 29 | Sue Billow | 52 | Wife | — | Pennsylvania |
| 30 | Ruth Ab Billow | 18 | Daughter | — | Pennsylvania |
| 31 | Paul Billow | 14 | Son | — | Pennsylvania |
| 32 | Harry Billow | 14 | Son | — | Pennsylvania |
| 33 | Grace Billow | 12 | Daughter | — | Pennsylvania |
| 34 | Thomas R. Harder | 66 | Head | — | Pennsylvania |
| 35 | Elizabeth Harder | 64 | Wife | — | Pennsylvania |
| 36 | Elias H. Weaver | 69 | Head | Pumper | Pennsylvania |
| 37 | Sadie Fox | 45 | Daughter | Trimmer | Pennsylvania |
| 38 | Henry W. Beaver | 31 | Son-in-law | Trucker | Pennsylvania |
| 39 | Lois Beaver | 28 | Daughter | — | Pennsylvania |
| 40 | Joyce A. Beaver | 3 | Grand-dau | — | 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)