MC
Mary Case — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Mary Case across the 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Case |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Automobile Company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 236 |
| Highest Grade | H-4 |
| 1935 Residence | Pennsylvania |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Stenographer |
| Township / Ward | Brookline |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Constance Case | Daughter | — | 15 | ~1925 |
| Richard Case | Son | — | 12 | ~1928 |
| Mary Case | Daughter | — | 23 | ~1917 |
| Lottie Case | Spouse | — | 47 | ~1893 |
| Walter Case | Son | — | 21 | ~1919 |
| Beatrice Case | Daughter | — | 20 | ~1920 |
| Walter Case | Head | — | 47 | ~1893 |
Census Appearances
1930
Montgomery, Pennsylvania
Daughter, age 13
Montgomery, Pennsylvania · implied b. ~1917 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Case |
| Given Name | Mary B |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Delaware-County, Pennsylvania
Daughter, age 23
Delaware-County, Pennsylvania · implied b. ~1917 — 7 household members
| Surname | Case |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Delaware |
| Occupation | Stenographer |
| Industry | Automobile Company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 236 |
| Highest Grade | H-4 |
| 1935 Residence | Pennsylvania |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Case across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Case
Daughter · 1940 · age 23 · b. ~1917 · Pennsylvania
★ You are viewing this record
Sibling
Beatrice Case
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Case
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Case
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Constance Case
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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03492-00464)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rine Tre Denick | 45 | Wife | Housewife | Pennsylvania |
| 2 | John Tre Denick | 12 | Son | — | Pennsylvania |
| 3 | Rine Tre Denick | 3 | Daughter | — | Pennsylvania |
| 4 | William M. Brown | 63 | Head | Decorative Upholstering | Maryland |
| 5 | Gertrude Brown | 60 | Wife | Housewife | Pennsylvania |
| 6 | Hugh G. Mcmullen | 47 | Head | Newspaper Editor | Ohio |
| 7 | Ettay Mcmullen | 39 | Wife | Housewife | Pennsylvania |
| 8 | Kathrine Mcmullen | 15 | Daughter | — | Pennsylvania |
| 9 | Hugh Jr. Mcmullen | 10 | Son | — | Pennsylvania |
| 10 | Charles S. Stokes | 72 | Head | Furniture Storage | Pennsylvania |
| 11 | Rebecca Swigart | 69 | Housekeeper | Housekeeper | Pennsylvania |
| 12 | Arthur Kurtz | 37 | Head | Office Manager | Pennsylvania |
| 13 | Mary C. Kurtz | 34 | Wife | Housewife | Pennsylvania |
| 14 | Patricia Kurtz | 6 | Daughter | — | Pennsylvania |
| 15 | Walter G. Case | 47 | Head | Proprietor | Pennsylvania |
| 16 | Lottie Case | 47 | Wife | Housewife | Pennsylvania |
| 17 | Mary Case THIS PERSON | 23 | Daughter | Stenographer | New Jersey |
| 18 | Walter Jr. Case | 21 | Son | Electrician Helper | Pennsylvania |
| 19 | Beatrice Case | 20 | Daughter | Stenographer | Pennsylvania |
| 20 | Constance Case | 15 | Daughter | — | Pennsylvania |
| 21 | Richard Case | 12 | Son | — | Pennsylvania |
| 22 | Kathrine Thomas | 65 | Head | Housewife | Pennsylvania |
| 23 | Jack Taylor | 35 | Son | Traveling Salesman | Pennsylvania |
| 24 | Ethel Taylor | 33 | Daughter-in-law | Housewife | Pennsylvania |
| 25 | Saltus Gardner | 58 | Head | Division Engineer | New York |
| 26 | Gertrude Gardner | 48 | Wife | Housewife | New Jersey |
| 27 | Saltus Jr. Gardner | 20 | Son | — | New York |
| 28 | Winifred Gardner | 18 | Daughter | — | New York |
| 29 | George T. Coulter | 35 | Head | Vessel Pilot | Pennsylvania |
| 30 | Mary H. Coulter | 36 | Wife | Housewife | Pennsylvania |
| 31 | Angie Coulter | 8 | Daughter | — | Pennsylvania |
| 32 | Charles A. Stegmair | 52 | Head | Traveling Salesman | Indiana |
| 33 | Carry B. Stegmair | 51 | Wife | Housewife | Ohio |
| 34 | Beth B. Stegmair | 21 | Daughter | — | Indiana |
| 35 | Borton Weeks | 49 | Head | Lawyer | Pennsylvania |
| 36 | Mayhe G. Weeks | 68 | Mother | Housewife | Pennsylvania |
| 37 | Francis A. Mccausland | 44 | Head | Housewife | Pennsylvania |
| 38 | James R. Mccausland | 19 | Son | — | Pennsylvania |
| 39 | John E. Mccausland | 18 | Son | — | Pennsylvania |
| 40 | William Mccausland | 16 | Son | — | 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)