MJ
Mary Jones — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Jones across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a daughter (b.~1908), then head of a 5-person household.
Age 32
b. ~1908
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Jones |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Tarentum Boro. |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Part time Tutoring |
| Industry | Own Home |
| Class of Worker | OA |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Part Time Tutoring |
| Township / Ward | Tarentum Boro |
| Est. Birth Year | ~1908 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mabel Jones | Daughter | — | 31 | ~1909 |
| Mary Jones | Daughter | — | 32 | ~1908 |
| Thomas Jones | Head | — | 69 | ~1871 |
| Richard Jones | Son | — | 22 | ~1918 |
| Bessie Jones | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 12
Allegheny, Pennsylvania · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 22
Allegheny, Pennsylvania · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Mary L. (at) |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 32
Allegheny-County, Pennsylvania · implied b. ~1908 — 5 household members
| Surname | Jones |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Tarentum Boro. |
| 1935 Residence (County) | Allegheny |
| Occupation | Part time Tutoring |
| Industry | Own Home |
| Class of Worker | OA |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same House |
| 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 Jones across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Jones (~0.92 confidence) and father Thomas Jones (~0.92 confidence) and father Flower Jones (~0.92 confidence) and mother Bessie Jones (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Jones
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Thomas Jones
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Flower Jones
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Bessie Jones
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Jones
Daughter · 1940 · age 32 · b. ~1908 · Pennsylvania
★ You are viewing this record
Sibling
Mabel Jones
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Jones
Sibling · 1940 · age 22
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03419-00079)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lincoln M. Ferguson | 33 | Head | Teacher | Ohio |
| 2 | Richard M. Ferguson | 8 | Son | — | Ohio |
| 3 | Shirley V. Ferguson | 7 | Son | — | Pennsylvania |
| 4 | M. Elizabeth Mahaffey | 63 | Head | Teacher | Pennsylvania |
| 5 | Susan D. Anchors | 71 | Head | — | Pennsylvania |
| 6 | George E. Hill | 24 | Head | Laborer | Pennsylvania |
| 7 | June A. Hill | 24 | Wife | — | Pennsylvania |
| 8 | Thomas V. Jones | 69 | Head | Proprietor | Pennsylvania |
| 9 | Bessie S. Jones | 57 | Wife | — | Pennsylvania |
| 10 | Mary Louise Jones THIS PERSON | 32 | Daughter | Part Time Tutoring | Pennsylvania |
| 11 | Mabel L. Jones | 31 | Daughter | — | Pennsylvania |
| 12 | Richard H. Jones | 22 | Son | Booker | Pennsylvania |
| 13 | Maude M. Brown | 67 | Head | — | Indiana |
| 14 | Lillie B. Mahaffey | 63 | Sister | — | Indiana |
| 15 | Anna M. Hillespie | 74 | Head | — | Pennsylvania |
| 16 | Edward J. Mack | 46 | Head | Operator'S Helper | Pennsylvania |
| 17 | Bessie Mack | 46 | Wife | — | Pennsylvania |
| 18 | George E. Mack | 17 | Son | — | Pennsylvania |
| 19 | John Zilla | 25 | Head | Bottler | Pennsylvania |
| 20 | Dorothy Zilla | 23 | Wife | Stenographer | Pennsylvania |
| 21 | William M. Altman | 64 | Head | — | Pennsylvania |
| 22 | Marie H. Altman | 65 | Wife | — | Pennsylvania |
| 23 | Edward D. Hamer | 33 | Head | Examiner | Pennsylvania |
| 24 | Freda Hamer | 24 | Wife | — | Pennsylvania |
| 25 | William Donnelly | 42 | Head | Classifier | Pennsylvania |
| 26 | Margaret Donnelly | 30 | Wife | — | Pennsylvania |
| 27 | John Hohnen | 47 | Head | Electrician | Pennsylvania |
| 28 | Edith Hohnen | 40 | Wife | — | Pennsylvania |
| 29 | Mildred Hohnen | 19 | Daughter | — | Pennsylvania |
| 30 | Richard Hohnen | 16 | Son | — | Pennsylvania |
| 31 | Hugh Mcinnes | 55 | Head | Laborer | Pennsylvania |
| 32 | Helen Mcinnes | 32 | Wife | Factor | Pennsylvania |
| 33 | Helen Mcinnes | 19 | Daughter | Stenographer | Pennsylvania |
| 34 | William Mcinnes | 17 | Son | Newspaper Carrier | Pennsylvania |
| 35 | Harold J. Hohman | 36 | Head | Assistant Superintendent | Pennsylvania |
| 36 | Anna Hohman | 36 | Wife | — | Pennsylvania |
| 37 | Dolores A. Hohman | 10 | Daughter | — | Pennsylvania |
| 38 | Audrey L. Hohman | 8 | Daughter | — | Pennsylvania |
| 39 | Norma J. Hohman | 4 | Daughter | — | Pennsylvania |
Related Census Records
Pedigree Summary
Mary + 2 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)